{"id":37410,"date":"2026-10-27T07:30:48","date_gmt":"2026-10-27T07:30:48","guid":{"rendered":"https:\/\/suresultmed.com\/?p=37410"},"modified":"2026-10-28T08:08:55","modified_gmt":"2026-10-28T08:08:55","slug":"hifu-depth-ultrasound","status":"publish","type":"post","link":"https:\/\/suresultmed.com\/el\/hifu-depth-ultrasound\/","title":{"rendered":"\u03a0\u03af\u03bd\u03b1\u03ba\u03b1\u03c2 \u03b2\u03ac\u03b8\u03bf\u03c5\u03c2 HIFU \u03b1\u03bd\u03ac \u03c0\u03b5\u03c1\u03b9\u03bf\u03c7\u03ae \u03c4\u03bf\u03c5 \u03c0\u03c1\u03bf\u03c3\u03ce\u03c0\u03bf\u03c5: \u03bc\u03b5\u03c4\u03c1\u03ae\u03c3\u03c4\u03b5 \u03c4\u03bf \u03b2\u03ac\u03b8\u03bf\u03c2 \u03c4\u03bf\u03c5 SMAS \u03c0\u03c1\u03b9\u03bd \u03b5\u03c0\u03b9\u03bb\u03ad\u03be\u03b5\u03c4\u03b5 \u03ba\u03b5\u03c6\u03b1\u03bb\u03ae 4,5, 3,0 \u03ae 2,0 mm"},"content":{"rendered":"<div class=\"sr-hifu-2026\" data-sr-format=\"house-chooser\" data-suresult-article-root data-suresult-reading-column data-sr-buyer-guide 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rgba(236,255,243,.85)}}\n.sr-light-toc{display:none;position:fixed;top:140px;left:calc(50% + 640px);width:300px;z-index:20;background:#fff;border:1px solid var(--rule);border-radius:4px;padding:18px 18px 16px;max-height:calc(100vh - 190px);overflow:auto;font-family:var(--mono)}\n.sr-light-toc__title{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--sub-line);margin:0 0 10px;font-weight:600}\n.sr-light-toc__head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin:0 0 10px}\n.sr-light-toc__progress{font-family:var(--mono);font-size:11px;color:var(--ink-faint);letter-spacing:.06em;font-variant-numeric:tabular-nums}\n.sr-light-toc__links{display:flex;flex-direction:column;counter-reset:toc}\n.sr-light-toc__links a{counter-increment:toc;display:flex;align-items:baseline;gap:10px;font-size:12px;line-height:1.35;color:var(--ink-soft);text-decoration:none;font-weight:400;padding:6px 8px 6px 10px;border-left:2px solid var(--rule-soft);transition:color .15s ease,background .15s ease,border-color .15s ease}\n.sr-light-toc__links a:before{content:counter(toc,decimal-leading-zero);font-family:var(--mono);font-size:11px;color:var(--ink-faint);letter-spacing:.06em;min-width:18px;flex:0 0 auto}\n.sr-light-toc__links a:hover{color:var(--ink);border-left-color:var(--sub);background:var(--panel)}\n.sr-light-toc__links a.sr-toc-active{color:var(--ink);font-weight:600;border-left-color:var(--sub);background:linear-gradient(90deg,var(--sub-soft) 0%,rgba(243,230,207,0) 70%)}\n.sr-light-toc__links a.sr-toc-active:before{color:var(--sub-line);font-weight:700}\n.sr-light-toc__note{font-family:var(--serif);font-size:13.5px;line-height:1.5;color:var(--ink-soft);margin:14px 0 10px!important;max-width:none!important}\n.sr-crisp-consult-btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;width:100%;min-height:44px;border:0;cursor:pointer;border-radius:4px;background:linear-gradient(135deg,#39e889 0%,#30d158 52%,#00c853 100%);color:#062e19;font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.04em;line-height:1.1;padding:12px 14px;box-shadow:0 8px 18px rgba(34,197,94,.24);animation:srLqBreath 2.65s ease-in-out infinite}\n.sr-crisp-consult-btn:before{content:\"\";width:8px;height:8px;border-radius:999px;background:#ecfff3;box-shadow:0 0 0 0 rgba(236,255,243,.78),0 0 9px rgba(236,255,243,.86);animation:srLqDotPulse 1.8s ease-out infinite}\n@media(min-width:1420px) and (max-width:1919px){\nbody:has(.sr-hifu-2026) .wd-content-area > .wd-author-bio,body:has(.sr-hifu-2026) .wd-content-area > .wd-single-footer,body:has(.sr-hifu-2026) .wd-content-area > .wd-page-nav,body:has(.sr-hifu-2026) .wd-content-area > 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li>b{font-family:var(--sans);font-weight:700;font-size:15.5px}\n.sr-hifu-2026 .sr-buy-list li>span{color:var(--ink-soft);font-size:15px}\n.sr-hifu-2026 .sr-buy-list li>a{font-weight:600;font-size:15px}\n.sr-hifu-2026 .sr-host{display:block;margin-top:5px;font-size:12px;line-height:1.4;color:var(--ink-faint);letter-spacing:.01em}\n.sr-hifu-2026 .sr-cmp-thumb,.sr-hifu-2026 .sr-atlas-card img.sr-atlas-photo{background:#eef2f1}\n.sr-hifu-2026 .sr-cmp-src{font-size:11px;text-transform:none;letter-spacing:0}\n.sr-hifu-2026 .sr-table-wrap th{font-size:12px;letter-spacing:.04em}\n.sr-hifu-2026 #comparison .sr-table-wrap td{vertical-align:top}\n.sr-hifu-2026 #comparison td.sr-cmp-cell{vertical-align:top}\n.sr-hifu-2026 #comparison .sr-comp.sr-table-wrap table{min-width:1180px;font-family:var(--sans);font-size:13px}\n.sr-hifu-2026 #comparison .sr-table-wrap th,.sr-hifu-2026 #comparison .sr-table-wrap td{min-width:112px;padding:11px 10px;font-size:13px;line-height:1.42}\n.sr-hifu-2026 #comparison 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td{display:block;width:auto!important;min-width:0!important;max-width:none!important}.sr-hifu-2026 #comparison .sr-comp.sr-table-wrap table{table-layout:auto}.sr-hifu-2026 #comparison .sr-comp.sr-table-wrap thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.sr-hifu-2026 #comparison .sr-comp.sr-table-wrap tr{border:1px solid var(--rule);border-radius:4px;background:var(--panel);margin:0 0 12px;padding:4px 0}.sr-hifu-2026 #comparison .sr-comp.sr-table-wrap td{border:0;border-top:1px solid var(--rule-soft);padding:9px 14px!important;font-size:14px}.sr-hifu-2026 #comparison .sr-comp.sr-table-wrap td:first-child{border-top:0}.sr-hifu-2026 #comparison .sr-comp.sr-table-wrap td[data-label]:before{content:attr(data-label);display:block;font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:3px}.sr-hifu-2026 #comparison .sr-cmp-idin{flex-direction:row;align-items:center}.sr-hifu-2026 #comparison .sr-cmp-thumb{width:52px;height:52px}.sr-hifu-2026 #comparison .sr-cmp-maker{display:inline}}\n.sr-hifu-2026 [data-sr-author-bio] p{font-size:15px;line-height:1.6;margin:12px 0;color:var(--ink-soft)}\n.sr-hifu-2026 .sr-author-card__role{font-family:var(--sans);text-transform:none;letter-spacing:0}\n.sr-hifu-2026 .sr-quick-answer{padding:24px 28px;background:#f3e6cf;border:1px solid #d6b478;margin:24px 0 36px}\n.sr-hifu-2026 .sr-table-wrap table{min-width:1030px;width:100%;table-layout:auto;font-size:14px;line-height:1.55}\n.sr-hifu-2026 .sr-table-wrap th,.sr-hifu-2026 .sr-table-wrap td{padding:14px;vertical-align:top;min-width:140px}\n.sr-hifu-2026 .sr-table-wrap td:first-child{min-width:240px;max-width:280px}\n.sr-hifu-2026 .sr-host{display:block;margin-top:7px;font-size:12px;line-height:1.55;color:var(--ink-soft)}\n.sr-hifu-2026 .sr-cmp-idin{display:flex;gap:12px;align-items:center}\n.sr-hifu-2026 .sr-cmp-thumb{width:72px;height:72px;object-fit:contain;flex:none;background:#e3e8ec}\n.sr-hifu-2026 .sr-atlas-photo{width:120px;height:120px;object-fit:contain;background:#e3e8ec}\n.sr-hifu-2026 .sr-band-foot{font:12px\/1.6 var(--sans);max-width:none}\n.sr-hifu-2026 .sr-guardrail-card{border-left:1px solid var(--rule)}\n.sr-hifu-2026 .sr-sources{font:13px\/1.6 var(--sans);overflow-wrap:anywhere}\n.sr-hifu-2026 ::selection{background:#e7c487;color:#1b2426}\n.sr-hifu-2026 :focus-visible{outline:2px solid #2f7d78;outline-offset:4px}\n.sr-hifu-2026 .sr-table-wrap{scrollbar-color:#7b9994 #e6ebe9;scrollbar-width:thin}\n@media(max-width:480px){.sr-hifu-2026 .sr-quick-answer{padding:20px 16px}.sr-hifu-2026 .sr-atlas-photo{width:88px;height:88px}.sr-hifu-2026 .sr-buy-list li{display:block}.sr-hifu-2026 .sr-buy-list li>*{display:block;margin:8px 0}}\n.sr-hifu-2026 .sr-family-sibling>p:empty,.sr-hifu-2026 .sr-family-sibling>br{display:none!important}\n.sr-hifu-2026 .sr-family-sibling>img{grid-column:1;grid-row:1}\n.sr-hifu-2026 .sr-family-sibling>div{grid-column:2;grid-row:1;min-width:0}\n@media(min-width:1000px){.sr-hifu-2026 #comparison .sr-table-wrap th:first-child,.sr-hifu-2026 #comparison .sr-table-wrap td:first-child{width:250px;min-width:240px}.sr-hifu-2026 #application-matrix table{width:100%;min-width:0;table-layout:fixed}.sr-hifu-2026 #application-matrix th,.sr-hifu-2026 #application-matrix td{min-width:0;max-width:none;overflow-wrap:anywhere}.sr-hifu-2026 #application-matrix th:first-child{width:18%}}\n.sr-hifu-2026 .sr-lead-figure img{width:100%;max-width:440px;height:auto;max-height:440px;object-fit:contain}\n@media(max-width:480px){.sr-hifu-2026 .sr-lead-figure img{width:260px;max-width:100%;height:auto;max-height:260px}}\n.sr-hifu-2026 #application-matrix th{white-space:normal;overflow-wrap:break-word;hyphens:auto;vertical-align:bottom;line-height:1.3}\n.sr-hifu-2026 #application-matrix tbody th{border-bottom:1px solid var(--rule-soft);background:transparent;text-transform:none;letter-spacing:0;font-family:var(--sans);font-size:14px}\n.sr-hifu-2026 #application-matrix td{font-family:var(--sans);font-size:13.5px;line-height:1.5}\n.sr-hifu-2026 #quick-answer{background:transparent;border:0;padding:0}\n.sr-hifu-2026 .sr-rank-buy{margin:0 0 18px}\n.sr-hifu-2026 a.sr-buy-cta{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 16px;background:var(--flat);color:#fff;font:700 15px\/1.3 var(--sans);text-decoration:none;border-radius:4px}\n.sr-hifu-2026 .sr-cmp-sibling{display:grid;grid-template-columns:36px minmax(0,1fr);gap:8px;align-items:start;margin-top:9px;font-size:12px;line-height:1.55}\n.sr-hifu-2026 .sr-cmp-sibling img{display:block;width:36px;height:36px;padding:3px;object-fit:contain;background:#e3e8ec}\n.sr-hifu-2026 .sr-cmp-family{margin-top:12px}\n.sr-hifu-2026 .sr-cmp-family summary{cursor:pointer;font:600 12px\/1.5 var(--sans);color:var(--flat)}\n@media(min-width:1420px) and (max-width:1919px){.sr-hifu-2026 #sr-hifu-toc .sr-light-toc__links a{display:grid;grid-template-columns:18px minmax(0,1fr);gap:5px;white-space:normal;overflow-wrap:anywhere}}\nbody:has(.sr-hifu-2026) .sr-hifu-2026 .sr-rank-buy a.sr-buy-cta{color:#fff!important}\n.sr-hifu-2026 .sr-cmp-family summary{list-style:none}\n.sr-hifu-2026 .sr-cmp-family summary::-webkit-details-marker{display:none}\n.sr-hifu-2026 .sr-cmp-family summary:after{content:\" +\";font-weight:700}\n.sr-hifu-2026 .sr-cmp-family[open] summary:after{content:\" \\2212\"}\n.sr-hifu-2026 .sr-family-siblings{clear:both;margin:24px 0 6px;padding:20px;border:1px solid var(--rule);background:var(--panel)}\n.sr-hifu-2026 .sr-family-siblings h4{font-family:var(--sans);font-size:18px;margin:0 0 14px;color:var(--ink)}\n.sr-hifu-2026 .sr-family-sibling{display:grid;grid-template-columns:80px minmax(0,1fr);gap:16px;padding:14px 0;border-top:1px solid var(--rule)}\n.sr-hifu-2026 .sr-family-sibling img.sr-family-thumb{width:80px;height:80px;object-fit:contain;background:#e3e8ec;margin:0;padding:5px;border:1px solid #d5dbe0}\n.sr-hifu-2026 .sr-family-sibling strong{font-family:var(--sans);font-size:17px}\n.sr-hifu-2026 .sr-family-sibling p{font-size:15px;line-height:1.6;margin:6px 0;max-width:none}\n.sr-hifu-2026 .sr-family-sibling .sr-family-price{font-weight:600;color:var(--ink)}\n.sr-hifu-2026 .sr-family-sibling .sr-family-score{font-family:var(--mono);font-size:12px;color:var(--ink-faint)}\n@media(max-width:480px){.sr-hifu-2026 .sr-family-siblings{padding:14px}.sr-hifu-2026 .sr-family-sibling{grid-template-columns:60px minmax(0,1fr);gap:12px}.sr-hifu-2026 .sr-family-sibling img.sr-family-thumb{width:60px;height:60px}}\n@media(min-width:768px){\n.sr-hifu-2026 .sr-table-wrap>table{margin:0}\n.sr-hifu-2026 .sr-table-wrap>table>tbody>tr:last-child>td{border-bottom:0}\n}\n.sr-hifu-2026 #comparison .sr-cmp-idin b{display:block;font:700 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1fr;gap:14px;align-items:stretch;margin:20px 0}\n.sr-hifu-2026 .sr-hifu-gallery .sr-fig{margin:0;height:100%;box-sizing:border-box}\n.sr-hifu-2026 .sr-hifu-gallery .sr-fig img{max-width:100%;max-height:300px;width:auto;object-fit:contain}\n@media(max-width:767px){.sr-hifu-2026 .sr-hifu-gallery{grid-template-columns:1fr}}\n@media(max-width:767px){.sr-hifu-2026 blockquote.sr-takeaway p{font-size:21px}}\n.sr-hifu-2026 #workflow>.sr-fig img{max-height:360px;width:auto;max-width:100%;object-fit:contain}\n.sr-hifu-2026 #bands td:nth-child(2),.sr-hifu-2026 #bands th:nth-child(2){white-space:nowrap}\n@media(min-width:768px){.sr-hifu-2026 #bands th:nth-child(2),.sr-hifu-2026 #bands td:nth-child(2){width:132px}}\n.sr-hifu-2026{min-width:0;max-width:1080px;width:100%}\n.sr-hifu-2026 [data-sr-prose-slot]{min-width:0}\n.sr-hifu-2026 [data-sr-prose-slot=deck] p{font-family:var(--serif);font-size:clamp(19px,2.2vw,22px);line-height:1.55;color:var(--ink-soft);max-width:62ch;margin:0 0 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#e5ebe8;color:#253d39;background:#fff;font-size:14px;line-height:1.6;min-width:0;max-width:none;width:auto;letter-spacing:0;text-transform:none;font-family:var(--sans)}\n.sr-hifu-2026 .sr-table-wrap th{background:#e8f0ed;font-weight:700;text-align:left;vertical-align:bottom}\n.sr-hifu-2026 .sr-table-wrap td:first-child{background:#f5f8f6;font-weight:650}\n.sr-hifu-2026 .sr-table-wrap th:last-child,.sr-hifu-2026 .sr-table-wrap td:last-child{border-right:0}\n.sr-hifu-2026 .sr-table-wrap tbody tr:last-child td{border-bottom:0}\n.sr-hifu-2026 .sr-table-wrap a{color:#235e50;text-decoration:underline;text-underline-offset:3px}\n.sr-hifu-2026 .sr-table-wrap tr.sr-hifu-group td{border-top:2px solid #cbdad4}\n.sr-hifu-2026 #table-cartridges th:nth-child(1){width:16%}\n.sr-hifu-2026 #table-cartridges th:nth-child(2){width:46%}\n.sr-hifu-2026 #table-sites th:nth-child(1){width:11%}\n.sr-hifu-2026 #table-sites th:nth-child(2){width:19%}\n.sr-hifu-2026 #table-sites th:nth-child(3){width:28%}\n.sr-hifu-2026 #table-sites th:nth-child(4){width:23%}\n.sr-hifu-2026 #table-yi-rules th:nth-child(1){width:38%}\n.sr-hifu-2026 #table-faceatlas-rules th:nth-child(1){width:28%}\n.sr-hifu-2026 #table-faceatlas-rules th:nth-child(2){width:28%}\n.sr-hifu-2026 #table-faceatlas-example th:nth-child(1){width:24%}\n.sr-hifu-2026 #table-faceatlas-example th:nth-child(2){width:14%}\n.sr-hifu-2026 #table-faceatlas-example th:nth-child(3){width:20%}\n.sr-hifu-2026 #table-routes th:nth-child(1){width:15%}\n.sr-hifu-2026 #table-routes th:nth-child(2){width:18%}\n.sr-hifu-2026 #table-routes th:nth-child(3){width:24%}\n.sr-hifu-2026 #table-routes th:nth-child(4){width:15%}\n.sr-hifu-2026 #table-routes th:nth-child(5){width:11%}\n.sr-hifu-2026 .sr-hifu-device{display:flex;flex-direction:column;align-items:flex-start;gap:10px}\n.sr-hifu-2026 .sr-hifu-device img.sr-hifu-device-img{display:block;width:96px;height:96px;max-width:none;object-fit:contain;background:#fff;border:1px solid #d8e2de;border-radius:4px;padding:4px;margin:0}\n.sr-hifu-2026 .sr-hifu-device a:not(#srx-z){font-weight:700;color:#01668f}\n.sr-hifu-2026 #table-faceatlas-rules td:nth-child(n+3),.sr-hifu-2026 #table-faceatlas-example td:nth-child(n+4){font-weight:700;color:#1b2426}\n@media(max-width:900px){\n.sr-hifu-2026 .sr-table-wrap.sr-hifu-cards{border:0;padding:0;background:transparent}\n.sr-hifu-2026 .sr-hifu-cards table,.sr-hifu-2026 .sr-hifu-cards caption,.sr-hifu-2026 .sr-hifu-cards tbody{display:block;width:100%}\n.sr-hifu-2026 .sr-hifu-cards caption{border:1px solid var(--rule);border-radius:4px}\n.sr-hifu-2026 .sr-hifu-cards thead{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}\n.sr-hifu-2026 .sr-hifu-cards tr{display:block;border:1px solid #cbdad4;margin:14px 0;background:#fff;border-radius:4px;overflow:hidden}\n.sr-hifu-2026 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.sr-table-wrap thead{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}\n.sr-hifu-2026 .sr-table-wrap tr{display:block;border:1px solid #cbdad4;margin:14px 0;background:#fff;border-radius:4px;overflow:hidden}\n.sr-hifu-2026 .sr-table-wrap td{display:block;width:100%;padding:12px 16px;border-right:0;font-size:15px}\n.sr-hifu-2026 .sr-table-wrap td:first-child{background:#edf2f0;font-size:16px;min-width:0;max-width:none}\n.sr-hifu-2026 .sr-table-wrap td::before{content:attr(data-label);display:block;font:700 12px\/1.5 var(--sans);letter-spacing:.02em;color:#425e54;margin-bottom:4px}\n.sr-hifu-2026 .sr-table-wrap td:first-child::before{display:none}\n.sr-hifu-2026 .sr-table-wrap tr.sr-hifu-group td{border-top:0}\n}\n.sr-hifu-2026 .sr-hifu-ladder{--val:128px;--gap:16px;--surface:#1b2426;background:var(--surface);color:#e9efed;border-radius:8px;padding:30px 30px 24px;margin:28px 0 40px;font-family:var(--sans)}\n.sr-hifu-2026 .sr-hifu-ladder p{max-width:none}\n.sr-hifu-2026 .sr-hifu-ladder-eyebrow{font:600 13px\/1.4 var(--mono);letter-spacing:.02em;text-transform:none;color:#e6c687;margin:0 0 16px}\n.sr-hifu-2026 .sr-hifu-ladder-key{display:flex;flex-wrap:wrap;gap:8px 20px;list-style:none;margin:0 0 22px;padding:0!important;font:13px\/1.4 var(--sans);color:#cbd8d5;max-width:none}\n.sr-hifu-2026 .sr-hifu-ladder-key li{display:flex;align-items:center;gap:8px;margin:0}\n.sr-hifu-2026 .sr-hifu-ladder-key i{display:inline-block;flex:0 0 auto}\n.sr-hifu-2026 .sr-hifu-k-measured{width:20px;height:8px;border-radius:4px;background:#199e70}\n.sr-hifu-2026 .sr-hifu-k-mean{width:10px;height:10px;border-radius:50%;background:#f4f7f6;box-shadow:0 0 0 2px var(--surface),0 0 0 3px rgba(255,255,255,.35)}\n.sr-hifu-2026 .sr-hifu-k-spread{width:20px;height:12px;border-radius:6px;background:rgba(201,133,0,.38)}\n.sr-hifu-2026 .sr-hifu-k-core{width:20px;height:12px;border-radius:6px;background:#c98500}\n.sr-hifu-2026 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.sr-hifu-ladder-rung{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) var(--val);column-gap:var(--gap);grid-template-areas:\"label label\" \"track value\";align-items:center;padding:12px 0 10px;border-top:1px solid rgba(255,255,255,.08)}\n.sr-hifu-2026 .sr-hifu-ladder-grid+.sr-hifu-ladder-rung{border-top:0}\n.sr-hifu-2026 .sr-hifu-ladder-rung--split{border-top:1px solid rgba(230,198,135,.35);margin-top:6px;padding-top:16px}\n.sr-hifu-2026 .sr-hifu-ladder-label{grid-area:label;font:600 14.5px\/1.4 var(--sans);color:#edf3f1;margin:0 0 8px}\n.sr-hifu-2026 .sr-hifu-track{grid-area:track;position:relative;height:22px}\n.sr-hifu-2026 .sr-hifu-track--pair{height:34px}\n.sr-hifu-2026 .sr-hifu-iv{position:absolute;top:50%;height:10px;transform:translateY(-50%);border-radius:5px;background:#199e70}\n.sr-hifu-2026 .sr-hifu-iv--spread{height:14px;border-radius:7px;background:rgba(201,133,0,.38)}\n.sr-hifu-2026 .sr-hifu-iv--core{height:14px;border-radius:7px;background:#c98500}\n.sr-hifu-2026 .sr-hifu-dot{position:absolute;top:50%;width:10px;height:10px;transform:translate(-50%,-50%);border-radius:50%;background:#f4f7f6;box-shadow:0 0 0 2px var(--surface)}\n.sr-hifu-2026 .sr-hifu-focus{position:absolute;top:-3px;bottom:-3px;width:2px;transform:translateX(-50%);background:#fff;border-radius:1px}\n.sr-hifu-2026 .sr-hifu-track--pair .sr-hifu-a{top:26%}\n.sr-hifu-2026 .sr-hifu-track--pair .sr-hifu-b{top:74%}\n.sr-hifu-2026 .sr-hifu-dot::after,.sr-hifu-2026 .sr-hifu-focus::after{content:\"\";position:absolute;inset:-7px}\n.sr-hifu-2026 .sr-hifu-ladder-value{grid-area:value;font:600 14px\/1.3 var(--mono);color:#f4f7f6;text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}\n.sr-hifu-2026 .sr-hifu-ladder-axis{position:relative;height:20px;margin:8px calc(var(--val) + var(--gap)) 0 0;font:12px\/1.4 var(--mono);color:#aebfbb}\n.sr-hifu-2026 .sr-hifu-ladder-axis span{position:absolute;top:0;transform:translateX(-50%);white-space:nowrap;font-variant-numeric:tabular-nums}\n.sr-hifu-2026 .sr-hifu-ladder-axis span:first-child{transform:none}\n.sr-hifu-2026 .sr-hifu-ladder-axis span:last-child{transform:translateX(-100%)}\n.sr-hifu-2026 .sr-hifu-ladder-foot{font:14px\/1.55 var(--sans);color:#d8e3e0;margin:18px 0 0;padding-top:14px;border-top:1px solid rgba(255,255,255,.12)}\n.sr-hifu-2026 .sr-hifu-ladder figcaption{font:12.5px\/1.6 var(--mono);color:#aebfbb;margin:12px 0 0}\n@media(max-width:640px){\n.sr-hifu-2026 .sr-hifu-ladder{--val:0px;--gap:0px;padding:22px 16px 18px;border-radius:6px;margin:24px -4px 32px}\n.sr-hifu-2026 .sr-hifu-ladder-rung{grid-template-columns:minmax(0,1fr) auto;column-gap:12px;grid-template-areas:\"label value\" \"track track\"}\n.sr-hifu-2026 .sr-hifu-ladder-value{align-self:start;padding-top:1px}\n.sr-hifu-2026 .sr-hifu-dot{width:8px;height:8px}\n.sr-hifu-2026 .sr-hifu-ladder-key{gap:8px 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var(--sans);margin:0 0 5px}\n.sr-hifu-2026 .srx-author-role{font:500 13px\/1.6 var(--sans);margin:0;color:#425e54}\n.sr-hifu-2026 .srx-author-details{grid-column:1\/-1;font:14px\/1.6 var(--sans)}\n.sr-hifu-2026 .srx-author-details p{font-size:14px}\n.sr-hifu-2026 .srx-author-details summary{cursor:pointer;color:#235e50;font-weight:650}\n.sr-hifu-2026 .srx-verified-badge{position:absolute;top:12px;right:12px;color:#286351;font-size:12px}\n.sr-hifu-2026 .srx-author-kicker{font:600 14px\/1.5 var(--sans);text-transform:none}\n.sr-hifu-2026 .sr-author-meta{text-transform:none}\n.sr-hifu-2026 :focus-visible{outline:2px solid #286351;outline-offset:4px}\n.sr-hifu-2026 ::selection{background:#d7e9db;color:#17392d}\n@media(max-width:767px){.sr-hifu-2026 .srx-author-list{grid-template-columns:minmax(0,1fr)}.sr-hifu-2026 #quick-answer{padding:20px 16px}.sr-hifu-2026 #quick-answer p{font-size:18px}}\n@media(max-width:767px){body:has(.sr-hifu-2026) #crisp-chatbox [role=\"button\"][data-maximized]{top:62px!important;bottom:auto!important;right:12px!important}body.logged-in:has(.sr-hifu-2026) #crisp-chatbox [role=\"button\"][data-maximized]{top:108px!important}body:has(.sr-hifu-2026):has(.whb-clone.whb-sticked) #crisp-chatbox [role=\"button\"][data-maximized]{top:0!important;bottom:auto!important}}\n<\/style>\n<div class=\"sr-mast\">\n<div data-sr-prose-slot=\"deck\">\n<p>A HIFU cartridge fires at a fixed depth, and the SMAS sits at a different depth on every face. In a 2026 randomized trial of women aged 60 to 72, skin to SMAS averaged 4.0 to 4.1 mm at the jowl and 4.3 to 4.4 mm under the chin, and the anatomy-guided arm used mainly 4.5 mm lines where it read 4.2 mm or more and mainly 3.0 mm lines under 4.0 mm. On the forehead the frontal bone lies 3.1 to 4.4 mm below the skin. This chart gives the published depths and cartridges site by site, and three ways to see the depth before the first pulse: Ultherapy DeepSEE, the Clarius L20 HD3 and a Suresult L-series probe with FaceAtlas AI.<\/p>\n<\/div>\n<p class=\"sr-author-meta\">October 27, 2026<\/p>\n<section aria-label=\"Reviewed by Suresult clinical authors\" class=\"srx-author-panel sr-author-panel\">\n<p class=\"srx-author-kicker\">Written and clinically reviewed by<\/p>\n<div class=\"srx-author-list\">\n<article class=\"srx-author-card sr-author-card\" data-sr-author=\"fernando-mariz-md\">\n<span aria-label=\"Verified author\" class=\"srx-verified-badge\">\u2713<\/span><br \/>\n<img loading=\"eager\" decoding=\"async\" width=\"72\" height=\"72\" alt=\"Fernando Mariz, MD\" class=\"srx-author-portrait\" src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/fernando-mariz-md-author-avatar.png\"\/><\/p>\n<div>\n<p class=\"srx-author-name\">Fernando Mariz, MD<\/p>\n<p class=\"srx-author-role\">Gynecology, pelvic surgery, women\u2019s health and sonography<\/p>\n<\/div>\n<details class=\"srx-author-details\">\n<summary>About Dr. Mariz<\/summary>\n<p>I\u2019m Dr. Fernando Mariz, a gynecology and pelvic surgery physician practicing in New York City. Before my medical career, I served in the U.S. Marine Corps, where I developed the discipline, focus, and steadiness that continue to shape the way I care for patients today. At Maiden Lane Medical, my work covers women\u2019s health, preventive care, sonography, pelvic pain, abnormal uterine bleeding, and minimally invasive gynecologic procedures.<\/p>\n<p class=\"srx-author-links\"><a href=\"https:\/\/www.maidenlanemedical.com\/doctors\/fernando-mariz\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Maiden Lane Medical profile<\/a> \u00b7 <a href=\"https:\/\/weillcornell.org\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Weill Cornell Medicine<\/a><\/p>\n<\/details>\n<\/article>\n<article class=\"srx-author-card sr-author-card\" data-sr-author=\"jailyn-avila-md\">\n<span aria-label=\"Verified author\" class=\"srx-verified-badge\">\u2713<\/span><br \/>\n<img loading=\"eager\" decoding=\"async\" width=\"72\" height=\"72\" alt=\"Jailyn Avila, MD\" class=\"srx-author-portrait\" src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/jailyn-avila-md-author-avatar.png\"\/><\/p>\n<div>\n<p class=\"srx-author-name\">Jailyn Avila, MD<\/p>\n<p class=\"srx-author-role\">Emergency medicine, POCUS education and digital health<\/p>\n<\/div>\n<details class=\"srx-author-details\">\n<summary>About Dr. Avila<\/summary>\n<p>I\u2019m Dr. Jailyn Avila, an emergency medicine physician, educator, and digital health innovator based in Southern California. My clinical work is rooted in emergency care, while my teaching focuses on point-of-care ultrasound, residency education, and practical training for physicians. Through my roles with Emergent Medical Associates, UHS SoCal MEC Emergency Medicine Residency, Core Ultrasound, and FemInEM, I work at the intersection of patient care, medical education, and accessible digital learning.<\/p>\n<p class=\"srx-author-links\"><a href=\"https:\/\/jailynavila.com\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">jailynavila.com<\/a> \u00b7 <a href=\"https:\/\/feminem.org\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">FemInEM<\/a><\/p>\n<\/details>\n<\/article>\n<\/div>\n<\/section>\n<\/div>\n<section id=\"quick-answer\">\n<h2>Quick Answer<\/h2>\n<div data-sr-prose-slot=\"quick-answer\">\n<p><strong>Measure depth to SMAS at each site before you choose the cartridge. For that job I recommend the Suresult L20Pro at {{SRX_PRICE:31250}} with FaceAtlas AI, three months included.<\/strong> In Yi&#8217;s 2026 randomized trial, 6 of 10 women treated from measured depth (mainly 4.5 mm lines from 4.2 mm to SMAS, mainly 3.0 mm lines under 4.0 mm) were rated \u201cmuch improved\u201d or better at week 16, against 4 of 10 on a fixed 4.5-plus-3.0 mm protocol with a similar shot count. The L20Pro images skin, fat and SMAS at 16\/20 MHz from forehead to neck, and FaceAtlas AI turns readings on the mid\/lower face, upper neck and neck into Linear and Dot focus depths and flags left\u2013right mismatches before you treat.<\/p>\n<\/div>\n<\/section>\n<section class=\"sr-quick-list\" id=\"quick-list\">\n<h2>The Quick List<\/h2>\n<div data-sr-prose-slot=\"quick-list\">\n<ul>\n<li><strong>Face, submental area and neck in one probe:<\/strong> Suresult L20Pro, {{SRX_PRICE:31250}}.<\/li>\n<li><strong>Thin forehead, temple and neck tissue at 24 MHz:<\/strong> Suresult L24Pro, {{SRX_PRICE:30649}}.<\/li>\n<li><strong>Heavy submental fat, body HIFU and MSK:<\/strong> Suresult L14Pro, {{SRX_PRICE:31438}}.<\/li>\n<li><strong>Same frequencies with 192 elements:<\/strong> Suresult L20, L24 and L14, from {{SRX_PRICE:28577}}.<\/li>\n<\/ul>\n<\/div>\n<\/section>\n<div class=\"sr-evalscope\" id=\"methodology\" data-sr-reviewer-scope>\n<div data-sr-prose-slot=\"method\">\n<p>Both authors of this guide are independent device reviewers with deep ultrasound knowledge. For this chart I worked from eight peer-reviewed studies published from 2022 to 2026 that measured facial layers by ultrasound or reported HIFU cartridge depths by site, the Ultherapy and Ultherapy PRIME instructions for use, and the maker pages for the Clarius L20 HD3, the Hironic Doublo and the Suresult L20Pro, L24Pro, L14Pro, L20, L24 and L14, all read on October 27, 2026. FaceAtlas AI&#8217;s focus-depth rules are taken from the app as shipped. Every depth in the charts comes from the study named in its row or caption.<\/p>\n<\/div>\n<\/div>\n<section id=\"routes\">\n<h2>Three ways to see depth before HIFU<\/h2>\n<div data-sr-prose-slot=\"routes-intro\">\n<p>A depth reading can come from imaging built into the HIFU handpiece, from a handheld probe the clinician reads, or from a probe whose software measures the depth and suggests the focus. Prices checked October 27, 2026.<\/p>\n<\/div>\n<div class=\"sr-table-wrap sr-hifu-cards\" role=\"region\" aria-label=\"Three routes to a depth reading before HIFU, checked October 27, 2026.\" tabindex=\"0\">\n<table id=\"table-routes\">\n<caption><span>Three routes to a depth reading before HIFU, checked October 27, 2026.<\/span><\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Device<\/th>\n<th scope=\"col\">Best for<\/th>\n<th scope=\"col\">How depth is seen<\/th>\n<th scope=\"col\">Who sets the cartridge<\/th>\n<th scope=\"col\">Price<\/th>\n<th scope=\"col\">Recurring cost<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-sr-cell=\"routes-0-0\" data-label=\"Device\"><span class=\"sr-hifu-device\" data-sr-model=\"Ultherapy PRIME\"><img class=\"sr-hifu-device-img\" src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/hifu-depth-ultrasound-ultherapy-prime.webp\" width=\"800\" height=\"800\" alt=\"Ultherapy PRIME control unit with the DeepSEE imaging screen and treatment handpiece\" loading=\"lazy\" decoding=\"async\"><a href=\"https:\/\/ultherapy.com\/physicians\/a-deeper-nonsurgical-lift\" target=\"_blank\" rel=\"noopener noreferrer nofollow\"><b>Ultherapy PRIME<\/b> with DeepSEE (Merz Aesthetics)<\/a><\/span><\/td>\n<td data-sr-cell=\"routes-0-1\" data-label=\"Best for\">Clinics that treat with Ultherapy&#x27;s own transducers and want the image at the moment of treatment<\/td>\n<td data-sr-cell=\"routes-0-2\" data-label=\"How depth is seen\">B-mode imaging built into each treatment transducer, 12\u201325 MHz, a 25 \u00d7 8 mm field, image depth 8 mm; a green line marks the treatment depth<\/td>\n<td data-sr-cell=\"routes-0-3\" data-label=\"Who sets the cartridge\">The operator, reading the image<\/td>\n<td data-sr-cell=\"routes-0-4\" data-label=\"Price\">By quote through an Ultherapy specialist<\/td>\n<td data-sr-cell=\"routes-0-5\" data-label=\"Recurring cost\">Replacement treatment transducers: each has a set line capacity and an expiry date<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"routes-1-0\" data-label=\"Device\"><span class=\"sr-hifu-device\" data-sr-model=\"Clarius L20 HD3\"><img class=\"sr-hifu-device-img\" src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-clarius-l20-v2.webp\" width=\"800\" height=\"800\" alt=\"Clarius L20 HD3 ultrasound probe\" loading=\"lazy\" decoding=\"async\"><a href=\"https:\/\/store.clarius.com\/products\/l20-hd3-handheld-ultrasound-scanner\" target=\"_blank\" rel=\"noopener noreferrer nofollow\"><b>Clarius L20 HD3<\/b><\/a><\/span><\/td>\n<td data-sr-cell=\"routes-1-1\" data-label=\"Best for\">Clinicians who read the layers themselves, beside any HIFU platform<\/td>\n<td data-sr-cell=\"routes-1-2\" data-label=\"How depth is seen\">Handheld linear probe, 8\u201320 MHz, image depth up to 4 cm; T-Mode AI Aesthetics labels dermis, fat, SMAS and muscle<\/td>\n<td data-sr-cell=\"routes-1-3\" data-label=\"Who sets the cartridge\">The operator, reading the labels<\/td>\n<td data-sr-cell=\"routes-1-4\" data-label=\"Price\">$5,395 USD at the Clarius store<\/td>\n<td data-sr-cell=\"routes-1-5\" data-label=\"Recurring cost\">Clarius Essentials membership for T-Mode: $695 a year, $1,785 for three years or $2,500 one-time<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"routes-2-0\" data-label=\"Device\"><span class=\"sr-hifu-device\" data-sr-model=\"Suresult L20Pro\"><img class=\"sr-hifu-device-img\" src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-l20pro.webp\" width=\"1000\" height=\"1000\" alt=\"Suresult L20Pro wireless linear ultrasound probe with tablet\" loading=\"lazy\" decoding=\"async\"><a href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l20pro-16-20mhz-high-frequency-linear-probe-ultrasound\/\"><b>Suresult L20Pro<\/b> with FaceAtlas AI<\/a><\/span><\/td>\n<td data-sr-cell=\"routes-2-1\" data-label=\"Best for\">A measured depth to SMAS, with suggested focus depths from mid-face to neck, beside any HIFU platform<\/td>\n<td data-sr-cell=\"routes-2-2\" data-label=\"How depth is seen\">Handheld linear probe, 16\/20 MHz, 256 elements, image depth up to 40 mm; FaceAtlas AI labels skin, fat and SMAS and measures depth to SMAS per site<\/td>\n<td data-sr-cell=\"routes-2-3\" data-label=\"Who sets the cartridge\">FaceAtlas AI suggests Linear and Dot depths and flags left\u2013right mismatches<\/td>\n<td data-sr-cell=\"routes-2-4\" data-label=\"Price\">{{SRX_PRICE:31250}}<\/td>\n<td data-sr-cell=\"routes-2-5\" data-label=\"Recurring cost\">Imaging app free; FaceAtlas AI: three months included, then {{SRX_STORE:36381}} a month or {{SRX_STORE:36382}} a year<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"sr-hifu-route-videos\">\n<figure class=\"sr-video\" data-sr-exact-model-video=\"Ultherapy PRIME\"><button type=\"button\" class=\"sr-video-poster\" aria-label=\"Ultherapy PRIME beside the original Ultherapy, video from WAVE Plastic Surgery\" onclick=\"this.hidden=true;const f=this.nextElementSibling;f.src=f.dataset.src;f.hidden=false;\"><img src=\"https:\/\/i.ytimg.com\/vi\/-rBXIEqvuYQ\/maxresdefault.jpg\" alt=\"Ultherapy PRIME beside the original Ultherapy, video from WAVE Plastic Surgery\" width=\"1280\" height=\"720\" loading=\"lazy\" decoding=\"async\"><svg viewBox=\"0 0 64 64\" aria-hidden=\"true\"><circle cx=\"32\" cy=\"32\" r=\"30\" fill=\"#102c25\"\/><path d=\"M26 18L46 32L26 46Z\" fill=\"white\"\/><\/svg><\/button><iframe src=\"https:\/\/www.youtube-nocookie.com\/embed\/-rBXIEqvuYQ\" loading=\"lazy\" data-src=\"https:\/\/www.youtube-nocookie.com\/embed\/-rBXIEqvuYQ?autoplay=1\" title=\"Ultherapy PRIME beside the original Ultherapy, video from WAVE Plastic Surgery\" width=\"960\" height=\"540\" allow=\"autoplay; encrypted-media; picture-in-picture\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen hidden><\/iframe><figcaption><a href=\"https:\/\/www.youtube.com\/watch?v=-rBXIEqvuYQ\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Ultherapy PRIME beside the original Ultherapy, video from WAVE Plastic Surgery<\/a><\/figcaption><\/figure>\n<figure class=\"sr-video\" data-sr-exact-model-video=\"Clarius L20 HD3\"><button type=\"button\" class=\"sr-video-poster\" aria-label=\"Clarius L20 HD3, video from Clarius Mobile Health\" onclick=\"this.hidden=true;const f=this.nextElementSibling;f.src=f.dataset.src;f.hidden=false;\"><img src=\"https:\/\/i.ytimg.com\/vi\/GCZ_ouvMIg4\/maxresdefault.jpg\" alt=\"Clarius L20 HD3, video from Clarius Mobile Health\" width=\"1280\" height=\"720\" loading=\"lazy\" decoding=\"async\"><svg viewBox=\"0 0 64 64\" aria-hidden=\"true\"><circle cx=\"32\" cy=\"32\" r=\"30\" fill=\"#102c25\"\/><path d=\"M26 18L46 32L26 46Z\" fill=\"white\"\/><\/svg><\/button><iframe src=\"https:\/\/www.youtube-nocookie.com\/embed\/GCZ_ouvMIg4\" loading=\"lazy\" data-src=\"https:\/\/www.youtube-nocookie.com\/embed\/GCZ_ouvMIg4?autoplay=1\" title=\"Clarius L20 HD3, video from Clarius Mobile Health\" width=\"960\" height=\"540\" allow=\"autoplay; encrypted-media; picture-in-picture\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen hidden><\/iframe><figcaption><a href=\"https:\/\/www.youtube.com\/watch?v=GCZ_ouvMIg4\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Clarius L20 HD3, video from Clarius Mobile Health<\/a><\/figcaption><\/figure>\n<\/div>\n<div data-sr-prose-slot=\"routes-ultherapy\">\n<p>DeepSEE images and treats through the same transducer, so the operator sees where the energy will land at the moment of treatment. Merz&#8217;s instructions describe the green treat line as the depth at which treatment will be delivered, and the imaging as a check on coupling and on a treatment depth that avoids bone. The view reaches 8 mm, and the cartridges are Ultherapy&#8217;s own 1.5, 3.0 and 4.5 mm transducers. Merz&#8217;s physician page states that layer depths \u201cvary greatly\u201d with age, smoking history, gender, body area, skin type and BMI.<\/p>\n<\/div>\n<div data-sr-prose-slot=\"routes-doublo\">\n<p>Hironic&#8217;s Doublo pairs its HIFU cartridges, such as the M7 (7 MHz, 3.0 mm) and D4 (4 MHz, 4.5 mm), with a 128-channel imaging probe for real-time images during treatment.<\/p>\n<\/div>\n<div data-sr-prose-slot=\"routes-handheld\">\n<p>A handheld probe works beside whichever HIFU platform the clinic already runs, Ultherapy, Ultraformer, Doublo or another, and keeps working between HIFU sessions for filler mapping, vessel checks and follow-up scans. On the Clarius L20 HD3, T-Mode AI Aesthetics labels the layers and the clinician chooses the cartridge; T-Mode, Vessel Depth AI and the aesthetic presets come with the Essentials membership at $695 a year, $1,785 for three years or $2,500 one-time. On the Suresult L20Pro, FaceAtlas AI measures depth to SMAS and writes the suggested focus from mid-face to neck into the plan, beside the free Suresult imaging app.<\/p>\n<\/div>\n<\/section>\n<section id=\"cartridges\">\n<h2>HIFU depth chart: what each cartridge targets<\/h2>\n<div data-sr-prose-slot=\"cartridges-intro\">\n<p>The number on a HIFU cartridge is its focal depth below the skin surface, and each depth targets its own layers. Lower frequencies reach deeper: most 4.5 mm cartridges run at 4 MHz and the 6 mm cartridge at 2 MHz.<\/p>\n<\/div>\n<div class=\"sr-table-wrap\" role=\"region\" aria-label=\"Cartridge depths, frequencies and target layers in published protocols (Lio 2022, Yi 2026, Zhu 2024, Kim 2024, Ultherapy IFU).\" tabindex=\"0\">\n<table id=\"table-cartridges\">\n<caption><span>Cartridge depths, frequencies and target layers in published protocols (Lio 2022, Yi 2026, Zhu 2024, Kim 2024, Ultherapy IFU).<\/span><\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Cartridge<\/th>\n<th scope=\"col\">Center frequency in published protocols<\/th>\n<th scope=\"col\">Target layer or site<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-sr-cell=\"cartridges-0-0\" data-label=\"Cartridge\">1.5 mm<\/td>\n<td data-sr-cell=\"cartridges-0-1\" data-label=\"Center frequency in published protocols\">10 MHz (Ultherapy DS 10-1.5)<\/td>\n<td data-sr-cell=\"cartridges-0-2\" data-label=\"Target layer or site\">Superficial dermis<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"cartridges-1-0\" data-label=\"Cartridge\">2.0 mm<\/td>\n<td data-sr-cell=\"cartridges-1-1\" data-label=\"Center frequency in published protocols\">5.5 MHz (Ultraformer III MF2)<\/td>\n<td data-sr-cell=\"cartridges-1-2\" data-label=\"Target layer or site\">Superficial treatment of the forehead, lips and neck<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"cartridges-2-0\" data-label=\"Cartridge\">3.0 mm<\/td>\n<td data-sr-cell=\"cartridges-2-1\" data-label=\"Center frequency in published protocols\">7 MHz (Ultraformer MPT, Ultherapy DS 7-3.0); 4 MHz (MicroUltra M3.0 and D3.0)<\/td>\n<td data-sr-cell=\"cartridges-2-2\" data-label=\"Target layer or site\">Deeper dermis and the dermal-to-subcutaneous layer<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"cartridges-3-0\" data-label=\"Cartridge\">4.5 mm<\/td>\n<td data-sr-cell=\"cartridges-3-1\" data-label=\"Center frequency in published protocols\">4 MHz (Ultraformer MPT, Ultherapy DS 4-4.5, MicroUltra M4.5 and D4.5); 7 MHz (Ultherapy DS 7-4.5)<\/td>\n<td data-sr-cell=\"cartridges-3-2\" data-label=\"Target layer or site\">SMAS and deep fat<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"cartridges-4-0\" data-label=\"Cartridge\">6.0 mm and deeper<\/td>\n<td data-sr-cell=\"cartridges-4-1\" data-label=\"Center frequency in published protocols\">2 MHz (Ultraformer III W2-6.0)<\/td>\n<td data-sr-cell=\"cartridges-4-2\" data-label=\"Target layer or site\">Temporal fat pad of the hair-bearing temple; abdomen and thigh fat in body contouring<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div data-sr-prose-slot=\"cartridges-linear-dot\">\n<p>Linear cartridges fire a row of focal points along a line; dot handpieces fire single points. In Zhu&#8217;s 2024 study the dot focal area measured about three times the diameter of the linear one (2\u20133 mm against 0.7 mm) and heated tissue to 50\u201360 \u00b0C, and the team used dot handpieces on the perioral and preauricular areas, where the mental nerve and facial nerve branches run. FaceAtlas AI suggests Linear and Dot focus depths for the mid\/lower face, upper neck and neck.<\/p>\n<\/div>\n<\/section>\n<section id=\"sites\">\n<h2>HIFU depth by facial site<\/h2>\n<div data-sr-prose-slot=\"sites-intro\">\n<p>Each row pairs what ultrasound studies measured at a site with the cartridges published protocols used there. Depths run from the skin surface down. Use the chart for the range to expect, then measure the client in front of you.<\/p>\n<\/div>\n<div class=\"sr-table-wrap sr-hifu-cards\" role=\"region\" aria-label=\"Published depths and cartridges by facial site. Means as reported; n = participants.\" tabindex=\"0\">\n<table id=\"table-sites\">\n<caption><span>Published depths and cartridges by facial site. Means as reported; n = participants.<\/span><\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Site<\/th>\n<th scope=\"col\">Layers from the surface<\/th>\n<th scope=\"col\">Published depths<\/th>\n<th scope=\"col\">Cartridges in published protocols<\/th>\n<th scope=\"col\">Check before treating<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-sr-cell=\"sites-0-0\" data-label=\"Site\">Forehead<\/td>\n<td data-sr-cell=\"sites-0-1\" data-label=\"Layers from the surface\">Skin, superficial and deep subcutaneous tissue, suprafrontal fascia, frontalis, connective tissue behind the frontalis, frontal bone<\/td>\n<td data-sr-cell=\"sites-0-2\" data-label=\"Published depths\">Skin 0.77\u20130.91 mm across BMI groups; skin and subcutaneous tissue above the frontalis 2.4 mm at BMI under 18.5 and 3.6 mm at BMI 28 or more; the five measured layers above the frontal bone add up to 3.1 and 4.4 mm in the same groups (Zhuang 2025, 15 MHz, n = 238)<\/td>\n<td data-sr-cell=\"sites-0-3\" data-label=\"Cartridges in published protocols\">2 mm at 0.3\u20130.4 J (Lio 2022); 1.5 mm and 2 mm across the forehead, 3 mm only weakly and without direct forehead shots, no 4.5 mm (Kim 2024)<\/td>\n<td data-sr-cell=\"sites-0-4\" data-label=\"Check before treating\">Depth to the frontal bone, so the focus stays above it<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"sites-1-0\" data-label=\"Site\">Temple<\/td>\n<td data-sr-cell=\"sites-1-1\" data-label=\"Layers from the surface\">Skin, fat, superficial temporal fascia (continuous with the SMAS), deep temporal fascia around the temporal fat pad<\/td>\n<td data-sr-cell=\"sites-1-2\" data-label=\"Published depths\">Epidermis and dermis 0.98 mm in women, 1.25 mm in men (Meng 2022, 24 MHz, n = 118); full skin 1.39 mm (Jeong 2023, n = 99)<\/td>\n<td data-sr-cell=\"sites-1-3\" data-label=\"Cartridges in published protocols\">4.5 mm at 0.7 J on the anterior temple; 6.0 mm at 1.0\u20131.2 J on the posterior, hair-bearing temple, aimed at the temporal fat pad (Lio 2022)<\/td>\n<td data-sr-cell=\"sites-1-4\" data-label=\"Check before treating\">Depth to the superficial temporal fascia on each side before a 4.5 mm line on the anterior temple<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"sites-2-0\" data-label=\"Site\">Mid-face and cheek<\/td>\n<td data-sr-cell=\"sites-2-1\" data-label=\"Layers from the surface\">Skin, superficial fat, SMAS (lateral to the nasolabial fold), deep fat<\/td>\n<td data-sr-cell=\"sites-2-2\" data-label=\"Published depths\">1 cm from the nasal ala: skin 1.99 mm, then 4.91 mm from the base of the dermis to mid-SMAS (Zhu 2024, 9\u201314 MHz, n = 20); malar skin 1.49 mm (Jeong 2023)<\/td>\n<td data-sr-cell=\"sites-2-3\" data-label=\"Cartridges in published protocols\">4.5 mm at 0.7 J on the zygomatic arch (Lio 2022); Dot 3.0 mm on the middle face (Zhu 2024); no 4.5 mm in the central face, where sensory and motor nerves run close to the surface (Kim 2024)<\/td>\n<td data-sr-cell=\"sites-2-4\" data-label=\"Check before treating\">Depth to SMAS on both sides before any 4.5 mm line<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"sites-3-0\" data-label=\"Site\">Jowl and jawline<\/td>\n<td data-sr-cell=\"sites-3-1\" data-label=\"Layers from the surface\">Skin, superficial fat, SMAS, deep fat, mandible<\/td>\n<td data-sr-cell=\"sites-3-2\" data-label=\"Published depths\">Skin to SMAS 3.98 \u00b1 0.44 and 4.08 \u00b1 0.48 mm in the two arms; superficial fat 2.12\u20132.18 mm; deep fat 3.42\u20133.48 mm (Yi 2026, women aged 60\u201372, n = 20); at the jawline landmark, skin 1.62 mm over 3.99 mm of subcutaneous tissue (Zhu 2024)<\/td>\n<td data-sr-cell=\"sites-3-3\" data-label=\"Cartridges in published protocols\">4.5 mm at 4 MHz for deep fat and SMAS, 3.0 mm at 7 MHz for the dermal-to-subcutaneous layer (Yi 2026); Linear and Dot 4.5 and 3.0 mm at 4 MHz on the lower face (Zhu 2024)<\/td>\n<td data-sr-cell=\"sites-3-4\" data-label=\"Check before treating\">Skin to SMAS 4.2 mm or more: mainly 4.5 mm lines; under 4.0 mm: mainly 3.0 mm lines (Yi 2026). Kim had patients puff their cheeks with air during 4.5 mm passes to shield the teeth<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"sites-4-0\" data-label=\"Site\">Submental<\/td>\n<td data-sr-cell=\"sites-4-1\" data-label=\"Layers from the surface\">Skin, subcutaneous fat, platysma (where the SMAS continues into the neck), deep fat<\/td>\n<td data-sr-cell=\"sites-4-2\" data-label=\"Published depths\">Skin to SMAS 4.32 \u00b1 0.62 and 4.42 \u00b1 0.57 mm; superficial fat 2.28\u20132.38 mm; deep fat 3.76\u20133.88 mm (Yi 2026); 1 cm below the mandible, skin 1.53 mm over 4.27 mm of subcutaneous tissue (Zhu 2024)<\/td>\n<td data-sr-cell=\"sites-4-3\" data-label=\"Cartridges in published protocols\">4.5 mm and 3.0 mm (Yi 2026); Linear 4.5 and 3.0 mm and Dot 3.0 mm (Zhu 2024)<\/td>\n<td data-sr-cell=\"sites-4-4\" data-label=\"Check before treating\">Submental fat 6.0 mm or more: more 4.5 mm lines (Yi 2026)<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"sites-5-0\" data-label=\"Site\">Neck<\/td>\n<td data-sr-cell=\"sites-5-1\" data-label=\"Layers from the surface\">Skin, thin soft tissue, platysma; thyroid cartilage at the midline<\/td>\n<td data-sr-cell=\"sites-5-2\" data-label=\"Published depths\">Epidermis and dermis 1.16 mm in women, 1.17 mm in men (Meng 2022)<\/td>\n<td data-sr-cell=\"sites-5-3\" data-label=\"Cartridges in published protocols\">1.5 mm, 2 mm and 3 mm; 4.5 mm only in very obese patients, aimed at the supra-platysmal fat (Kim 2024)<\/td>\n<td data-sr-cell=\"sites-5-4\" data-label=\"Check before treating\">Depth to the platysma on each side, with every line kept off the thyroid gland, thyroid cartilage and trachea (Ultherapy IFU)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<figure class=\"sr-hifu-ladder\" id=\"depth-ladder\" aria-label=\"HIFU depth ladder from 0 to 8 mm below the skin surface\">\n<p class=\"sr-hifu-ladder-eyebrow\">Depth ladder \u00b7 millimeters below the skin surface<\/p>\n<ul class=\"sr-hifu-ladder-key\">\n<li><i class=\"sr-hifu-k-measured\" aria-hidden=\"true\"><\/i>Measured depth<\/li>\n<li><i class=\"sr-hifu-k-mean\" aria-hidden=\"true\"><\/i>Group mean<\/li>\n<li><i class=\"sr-hifu-k-spread\" aria-hidden=\"true\"><\/i>Coagulation, full depth<\/li>\n<li><i class=\"sr-hifu-k-core\" aria-hidden=\"true\"><\/i>Coagulation, most confined<\/li>\n<li><i class=\"sr-hifu-k-focus\" aria-hidden=\"true\"><\/i>Cartridge focus<\/li>\n<li><i class=\"sr-hifu-k-zone\" aria-hidden=\"true\"><\/i>Yi 2026 decision band, 4.0\u20134.2 mm<\/li>\n<\/ul>\n<div class=\"sr-hifu-ladder-plot\">\n<div class=\"sr-hifu-ladder-grid\" aria-hidden=\"true\"><i style=\"left:0%\"><\/i><i style=\"left:12.5%\"><\/i><i style=\"left:25%\"><\/i><i style=\"left:37.5%\"><\/i><i style=\"left:50%\"><\/i><i style=\"left:62.5%\"><\/i><i style=\"left:75%\"><\/i><i style=\"left:87.5%\"><\/i><i style=\"left:100%\"><\/i><\/div>\n<div class=\"sr-hifu-ladder-rung\">\n<p class=\"sr-hifu-ladder-label\">Forehead: layers above the frontal bone, by BMI group<\/p>\n<div class=\"sr-hifu-track\" aria-hidden=\"true\"><span class=\"sr-hifu-iv\" style=\"left:39.25%;width:16%\" title=\"Four BMI groups: 3.14\u20134.42 mm\"><\/span><span class=\"sr-hifu-dot\" style=\"left:39.25%\" title=\"BMI under 18.5: 3.14 mm\"><\/span><span class=\"sr-hifu-dot\" style=\"left:42.5%\" title=\"BMI 18.5 to under 24: 3.40 mm\"><\/span><span class=\"sr-hifu-dot\" style=\"left:48.125%\" title=\"BMI 24 to under 28: 3.85 mm\"><\/span><span class=\"sr-hifu-dot\" style=\"left:55.25%\" title=\"BMI 28 or more: 4.42 mm\"><\/span><\/div>\n<p><span class=\"sr-hifu-ladder-value\">3.1\u20134.4 mm<\/span><\/div>\n<div class=\"sr-hifu-ladder-yi\">\n<div class=\"sr-hifu-ladder-yi-band\" aria-hidden=\"true\"><span class=\"sr-hifu-ladder-zone\" style=\"left:50%;width:2.5%\" title=\"Yi 2026 decision band, 4.0\u20134.2 mm\"><\/span><\/div>\n<div class=\"sr-hifu-ladder-rung\">\n<p class=\"sr-hifu-ladder-label\">Jowl: skin to SMAS, two trial arms<\/p>\n<div class=\"sr-hifu-track sr-hifu-track--pair\" aria-hidden=\"true\"><span class=\"sr-hifu-iv sr-hifu-a\" style=\"left:44.25%;width:11%\" title=\"Conventional arm: 3.98 \u00b1 0.44 mm\"><\/span><span class=\"sr-hifu-dot sr-hifu-a\" style=\"left:49.75%\" title=\"Conventional arm, mean: 3.98 mm\"><\/span><span class=\"sr-hifu-iv sr-hifu-b\" style=\"left:45%;width:12%\" title=\"Anatomy-guided arm: 4.08 \u00b1 0.48 mm\"><\/span><span class=\"sr-hifu-dot sr-hifu-b\" style=\"left:51%\" title=\"Anatomy-guided arm, mean: 4.08 mm\"><\/span><\/div>\n<p><span class=\"sr-hifu-ladder-value\">3.98 \/ 4.08 mm<\/span><\/div>\n<div class=\"sr-hifu-ladder-rung\">\n<p class=\"sr-hifu-ladder-label\">Under the chin: skin to SMAS, two trial arms<\/p>\n<div class=\"sr-hifu-track sr-hifu-track--pair\" aria-hidden=\"true\"><span class=\"sr-hifu-iv sr-hifu-a\" style=\"left:46.25%;width:15.5%\" title=\"Conventional arm: 4.32 \u00b1 0.62 mm\"><\/span><span class=\"sr-hifu-dot sr-hifu-a\" style=\"left:54%\" title=\"Conventional arm, mean: 4.32 mm\"><\/span><span class=\"sr-hifu-iv sr-hifu-b\" style=\"left:48.125%;width:14.25%\" title=\"Anatomy-guided arm: 4.42 \u00b1 0.57 mm\"><\/span><span class=\"sr-hifu-dot sr-hifu-b\" style=\"left:55.25%\" title=\"Anatomy-guided arm, mean: 4.42 mm\"><\/span><\/div>\n<p><span class=\"sr-hifu-ladder-value\">4.32 \/ 4.42 mm<\/span><\/div>\n<\/div>\n<div class=\"sr-hifu-ladder-rung sr-hifu-ladder-rung--split\">\n<p class=\"sr-hifu-ladder-label\">3.0 mm cartridge, 4 MHz MicroUltra: coagulation depth in a gel phantom<\/p>\n<div class=\"sr-hifu-track\" aria-hidden=\"true\"><span class=\"sr-hifu-iv sr-hifu-iv--spread\" style=\"left:18.75%;width:50%\" title=\"Coagulation, full depth: 1.5\u20135.5 mm\"><\/span><span class=\"sr-hifu-iv sr-hifu-iv--core\" style=\"left:25%;width:18.75%\" title=\"Coagulation, most confined: 2.0\u20133.5 mm\"><\/span><span class=\"sr-hifu-focus\" style=\"left:37.5%\" title=\"Cartridge focus: 3.0 mm\"><\/span><\/div>\n<p><span class=\"sr-hifu-ladder-value\">1.5\u20135.5 mm<\/span><\/div>\n<div class=\"sr-hifu-ladder-rung\">\n<p class=\"sr-hifu-ladder-label\">4.5 mm linear cartridge, 4 MHz MicroUltra: coagulation depth in a gel phantom<\/p>\n<div class=\"sr-hifu-track\" aria-hidden=\"true\"><span class=\"sr-hifu-iv sr-hifu-iv--spread\" style=\"left:31.25%;width:56.25%\" title=\"Coagulation, full depth: 2.5\u20137.0 mm\"><\/span><span class=\"sr-hifu-iv sr-hifu-iv--core\" style=\"left:37.5%;width:18.75%\" title=\"Coagulation, most confined: 3.0\u20134.5 mm\"><\/span><span class=\"sr-hifu-focus\" style=\"left:56.25%\" title=\"Cartridge focus: 4.5 mm\"><\/span><\/div>\n<p><span class=\"sr-hifu-ladder-value\">2.5\u20137.0 mm<\/span><\/div>\n<\/div>\n<div class=\"sr-hifu-ladder-axis\" aria-hidden=\"true\"><span style=\"left:0%\">0<\/span><span class=\"sr-hifu-odd\" style=\"left:12.5%\">1<\/span><span style=\"left:25%\">2<\/span><span class=\"sr-hifu-odd\" style=\"left:37.5%\">3<\/span><span style=\"left:50%\">4<\/span><span class=\"sr-hifu-odd\" style=\"left:62.5%\">5<\/span><span style=\"left:75%\">6<\/span><span class=\"sr-hifu-odd\" style=\"left:87.5%\">7<\/span><span style=\"left:100%\">8 mm<\/span><\/div>\n<p class=\"sr-hifu-ladder-foot\">Under 4.0 mm to SMAS, Yi&#x27;s guided arm used mainly 3.0 mm lines; at 4.2 mm or more, mainly 4.5 mm lines. FaceAtlas AI suggests the 3.0 mm focus for mid\/lower-face readings from 3.0 to 4.4 mm and the 4.5 mm focus from 4.5 mm.<\/p><figcaption>Forehead: the five layers above the frontal bone, summed, in four BMI groups (Zhuang 2025). Jowl and under the chin: skin-to-SMAS depth, mean \u00b1 1 SD, in the two arms of Yi 2026. Cartridges: coagulation depth of the 4 MHz MicroUltra 3.0 and 4.5 mm cartridges at full power (6.63 W) in a silica gel phantom (Zhu 2024).<\/figcaption><\/figure>\n<\/section>\n<section id=\"why\">\n<h2>Why every face needs its own depth reading<\/h2>\n<div data-sr-prose-slot=\"why-skin\">\n<p>Skin changes little across the face. Jeong&#8217;s team measured full skin thickness at eight facial points in 99 adults and found means of 1.31 to 1.67 mm, with no link to BMI. The layers beneath the skin move. On the forehead, the deep subcutaneous layer grows from 1.07 mm in the leanest BMI group to 1.88 mm in the heaviest, and the superficial layer thickens with age (Zhuang 2025). At the jowl, Yi&#8217;s two arms of ten women averaged 3.98 and 4.08 mm from skin to SMAS, with standard deviations of 0.44 and 0.48 mm, so the line between the 3.0 and 4.5 mm cartridge runs through the middle of the group.<\/p>\n<\/div>\n<div data-sr-prose-slot=\"why-band\">\n<p>A cartridge heats a band of tissue, not a single plane. In Zhu&#8217;s phantom tests, the 4 MHz MicroUltra 3.0 mm cartridges coagulated from about 1.5 to 5.5 mm deep, most tightly at 2 to 3.5 mm, and the 4.5 mm cartridges from 2.5 to 7.0 mm, most tightly at 3 to 4.5 mm (linear) and 3 to 5 mm (dot). In thin tissue that band reaches past the target: Zhu&#8217;s team explains the lack of clear improvement in underweight participants by the band acting on muscle, bone or deeper fat instead of the superficial subcutaneous tissue. Kim reports the same limit on the forehead: strong 3 mm shots over the frontal bone were painful, so the 3 mm cartridge passed over the forehead only weakly, without direct shots, and the 4.5 mm not at all.<\/p>\n<\/div>\n<div data-sr-prose-slot=\"why-pressure\">\n<p>The handpiece also moves the target. Zhu&#8217;s team saw better results where lower-face skin and tissue measured 5 to 7 mm, and puts handpiece compression at about 80%, which brings that tissue to 4 to 5.6 mm, the depth most shots targeted. So the planning reading is taken at rest, and pressure belongs to technique: Kim pressed harder on obese patients to reach deeper tissue.<\/p>\n<\/div>\n<div data-sr-prose-slot=\"why-trial\">\n<p>Yi&#8217;s 2026 randomized trial treated 20 women aged 60 to 72 on the same Ultraformer MPT. The conventional arm received one 4.5 mm pass at 0.7 J and one 3.0 mm pass at 0.4 J on every face. The anatomy-guided arm had its cartridges, energy (0.6\u20130.8 J at 4.5 mm, 0.3\u20130.5 J at 3.0 mm) and line spacing set region by region from baseline ultrasound, for a similar 380 to 450 shots per session. At week 16 an independent investigator, blind to the arm, rated 6 of 10 women in the guided arm \u201cmuch improved\u201d or better against 4 of 10 in the conventional arm, and lower-face skin-to-SMAS distance fell 0.19 mm more with guidance.<\/p>\n<\/div>\n<\/section>\n<section id=\"measure\">\n<h2>How to measure depth to SMAS before HIFU<\/h2>\n<div data-sr-prose-slot=\"measure-steps\">\n<ol>\n<li><strong>Choose a high-frequency linear probe.<\/strong> The studies behind these charts imaged facial layers with linear probes of up to 33 MHz: 15 MHz for Zhuang&#8217;s forehead survey, 24 MHz for Meng&#8217;s skin survey and 24 to 33 MHz for Zattar&#8217;s SMAS atlas.<\/li>\n<li><strong>Scan at rest.<\/strong> Use a generous layer of gel or a coupling pad and the lightest contact that keeps the image full. Yi&#8217;s and Zhuang&#8217;s teams scanned through a generous gel layer to avoid compression, and Zhu&#8217;s applied the probe without compressing the skin.<\/li>\n<li><strong>Hold the probe perpendicular to the skin<\/strong> at the treatment point, with the same landmarks and orientation at every visit: Yi&#8217;s team measured the jowl lateral to the mouth corner above the mandibular border, and the submental midline just below the menton.<\/li>\n<li><strong>Measure from the skin surface to the SMAS,<\/strong> and note the superficial fat above it and the deep fat below it: those readings set energy and line counts in Yi&#8217;s protocol.<\/li>\n<li><strong>Scan both sides.<\/strong> Left and right differ: in Zhuang&#8217;s forehead survey the frontalis and the connective tissue beneath it were thicker on one side at several points.<\/li>\n<li><strong>Write a plan per region:<\/strong> cartridge, energy and line spacing for each zone, the way Yi&#8217;s anatomy-guided arm was treated.<\/li>\n<\/ol>\n<\/div>\n<div class=\"sr-table-wrap\" role=\"region\" aria-label=\"Anatomy-guided rules in Yi et al., 2026 (Ultraformer MPT; conventional arm fixed at 0.7 J and 0.4 J).\" tabindex=\"0\">\n<table id=\"table-yi-rules\">\n<caption><span>Anatomy-guided rules in Yi et al., 2026 (Ultraformer MPT; conventional arm fixed at 0.7 J and 0.4 J).<\/span><\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Measured at the site<\/th>\n<th scope=\"col\">What the guided arm did<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-sr-cell=\"yi-rules-0-0\" data-label=\"Measured at the site\">Skin to SMAS 4.2 mm or more<\/td>\n<td data-sr-cell=\"yi-rules-0-1\" data-label=\"What the guided arm did\">Mainly 4.5 mm lines<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"yi-rules-1-0\" data-label=\"Measured at the site\">Skin to SMAS under 4.0 mm<\/td>\n<td data-sr-cell=\"yi-rules-1-1\" data-label=\"What the guided arm did\">Mainly 3.0 mm lines<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"yi-rules-2-0\" data-label=\"Measured at the site\">Superficial fat under 2.0 mm<\/td>\n<td data-sr-cell=\"yi-rules-2-1\" data-label=\"What the guided arm did\">Lower energy on the 3.0 mm cartridge<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"yi-rules-3-0\" data-label=\"Measured at the site\">Deep fat 3.5 mm or more<\/td>\n<td data-sr-cell=\"yi-rules-3-1\" data-label=\"What the guided arm did\">A larger share of 4.5 mm lines<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"yi-rules-4-0\" data-label=\"Measured at the site\">Submental fat 6.0 mm or more<\/td>\n<td data-sr-cell=\"yi-rules-4-1\" data-label=\"What the guided arm did\">More 4.5 mm lines under the chin<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"yi-rules-5-0\" data-label=\"Measured at the site\">Thicker or thinner tissue<\/td>\n<td data-sr-cell=\"yi-rules-5-1\" data-label=\"What the guided arm did\">Line spacing 2.5 mm in thicker regions, 3.5 mm in thinner ones (3.0 mm standard)<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"yi-rules-6-0\" data-label=\"Measured at the site\">Overall tissue thickness<\/td>\n<td data-sr-cell=\"yi-rules-6-1\" data-label=\"What the guided arm did\">0.6\u20130.8 J on the 4.5 mm cartridge, 0.3\u20130.5 J on the 3.0 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section id=\"faceatlas\">\n<h2>FaceAtlas AI: SMAS depth at every site, focus depths from mid-face to neck<\/h2>\n<div data-sr-prose-slot=\"faceatlas-intro\">\n<p>FaceAtlas AI runs the same logic on every scan. Paired with a Suresult L14, L20 or L24 probe or its Pro version on a 64-bit Android tablet or phone (Android 8.0 or later), it labels skin, fat and SMAS on the live image, measures depth to SMAS only on frames that pass its image-quality check, and turns readings on the mid\/lower face, upper neck and neck into Linear and Dot focus depths. The L14Pro, L20Pro and L24Pro include three months; on the L14, L20 and L24 a <a href=\"https:\/\/suresultmed.com\/shop\/software-ai\/faceatlas-ai-monthly-license-ai-skin-ultrasound-software\/\">license<\/a> starts at {{SRX_STORE:36381}} a month.<\/p>\n<\/div>\n<div class=\"sr-table-wrap\" role=\"region\" aria-label=\"FaceAtlas AI focus-depth suggestions by zone, Classic protocol.\" tabindex=\"0\">\n<table id=\"table-faceatlas-rules\">\n<caption><span>FaceAtlas AI focus-depth suggestions by zone, Classic protocol.<\/span><\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Zone<\/th>\n<th scope=\"col\">Depth to SMAS<\/th>\n<th scope=\"col\">Linear focus (mm)<\/th>\n<th scope=\"col\">Dot focus (mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-sr-cell=\"faceatlas-rules-0-0\" data-label=\"Zone\">Mid\/lower face<\/td>\n<td data-sr-cell=\"faceatlas-rules-0-1\" data-label=\"Depth to SMAS\">Under 3.0 mm<\/td>\n<td data-sr-cell=\"faceatlas-rules-0-2\" data-label=\"Linear focus (mm)\">\u2013<\/td>\n<td data-sr-cell=\"faceatlas-rules-0-3\" data-label=\"Dot focus (mm)\">\u2013<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"faceatlas-rules-1-0\" data-label=\"Zone\">Mid\/lower face<\/td>\n<td data-sr-cell=\"faceatlas-rules-1-1\" data-label=\"Depth to SMAS\">3.0\u20134.4 mm<\/td>\n<td data-sr-cell=\"faceatlas-rules-1-2\" data-label=\"Linear focus (mm)\">3.0<\/td>\n<td data-sr-cell=\"faceatlas-rules-1-3\" data-label=\"Dot focus (mm)\">3.0, 2.0<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"faceatlas-rules-2-0\" data-label=\"Zone\">Mid\/lower face<\/td>\n<td data-sr-cell=\"faceatlas-rules-2-1\" data-label=\"Depth to SMAS\">4.5 mm or more<\/td>\n<td data-sr-cell=\"faceatlas-rules-2-2\" data-label=\"Linear focus (mm)\">4.5, 3.0<\/td>\n<td data-sr-cell=\"faceatlas-rules-2-3\" data-label=\"Dot focus (mm)\">4.5, 3.0, 2.0<\/td>\n<\/tr>\n<tr class=\"sr-hifu-group\">\n<td data-sr-cell=\"faceatlas-rules-3-0\" data-label=\"Zone\">Upper neck<\/td>\n<td data-sr-cell=\"faceatlas-rules-3-1\" data-label=\"Depth to SMAS\">Under 3.0 mm<\/td>\n<td data-sr-cell=\"faceatlas-rules-3-2\" data-label=\"Linear focus (mm)\">\u2013<\/td>\n<td data-sr-cell=\"faceatlas-rules-3-3\" data-label=\"Dot focus (mm)\">\u2013<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"faceatlas-rules-4-0\" data-label=\"Zone\">Upper neck<\/td>\n<td data-sr-cell=\"faceatlas-rules-4-1\" data-label=\"Depth to SMAS\">3.0\u20134.4 mm<\/td>\n<td data-sr-cell=\"faceatlas-rules-4-2\" data-label=\"Linear focus (mm)\">3.0<\/td>\n<td data-sr-cell=\"faceatlas-rules-4-3\" data-label=\"Dot focus (mm)\">3.0<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"faceatlas-rules-5-0\" data-label=\"Zone\">Upper neck<\/td>\n<td data-sr-cell=\"faceatlas-rules-5-1\" data-label=\"Depth to SMAS\">4.5\u20135.9 mm<\/td>\n<td data-sr-cell=\"faceatlas-rules-5-2\" data-label=\"Linear focus (mm)\">4.5, 3.0<\/td>\n<td data-sr-cell=\"faceatlas-rules-5-3\" data-label=\"Dot focus (mm)\">4.5, 3.0<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"faceatlas-rules-6-0\" data-label=\"Zone\">Upper neck<\/td>\n<td data-sr-cell=\"faceatlas-rules-6-1\" data-label=\"Depth to SMAS\">6.0 mm or more<\/td>\n<td data-sr-cell=\"faceatlas-rules-6-2\" data-label=\"Linear focus (mm)\">4.5, 3.0<\/td>\n<td data-sr-cell=\"faceatlas-rules-6-3\" data-label=\"Dot focus (mm)\">6.0, 3.0<\/td>\n<\/tr>\n<tr class=\"sr-hifu-group\">\n<td data-sr-cell=\"faceatlas-rules-7-0\" data-label=\"Zone\">Neck<\/td>\n<td data-sr-cell=\"faceatlas-rules-7-1\" data-label=\"Depth to SMAS\">Under 2.0 mm<\/td>\n<td data-sr-cell=\"faceatlas-rules-7-2\" data-label=\"Linear focus (mm)\">\u2013<\/td>\n<td data-sr-cell=\"faceatlas-rules-7-3\" data-label=\"Dot focus (mm)\">\u2013<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"faceatlas-rules-8-0\" data-label=\"Zone\">Neck<\/td>\n<td data-sr-cell=\"faceatlas-rules-8-1\" data-label=\"Depth to SMAS\">2.0\u20133.4 mm<\/td>\n<td data-sr-cell=\"faceatlas-rules-8-2\" data-label=\"Linear focus (mm)\">\u2013<\/td>\n<td data-sr-cell=\"faceatlas-rules-8-3\" data-label=\"Dot focus (mm)\">2.0<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"faceatlas-rules-9-0\" data-label=\"Zone\">Neck<\/td>\n<td data-sr-cell=\"faceatlas-rules-9-1\" data-label=\"Depth to SMAS\">3.5 mm or more<\/td>\n<td data-sr-cell=\"faceatlas-rules-9-2\" data-label=\"Linear focus (mm)\">3.0<\/td>\n<td data-sr-cell=\"faceatlas-rules-9-3\" data-label=\"Dot focus (mm)\">3.0, 2.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div data-sr-prose-slot=\"faceatlas-rules-note\">\n<p>Readings are rounded to 0.1 mm before the rule runs, so a site shown as 4.5 mm gets the 4.5 mm focus. On the mid\/lower face and upper neck the deepest focus suggested never sits deeper than the depth to SMAS on screen; read at rest, as in Yi&#8217;s trial, that is a step stricter than Yi&#8217;s 4.2 mm line. On the neck the 3.0 mm focus begins at 3.5 mm. The first suggestion comes at 3.0 mm to SMAS on the mid\/lower face and upper neck and at 2.0 mm on the neck; on the upper face FaceAtlas AI records depth to SMAS for the plan.<\/p>\n<\/div>\n<div class=\"sr-table-wrap\" role=\"region\" aria-label=\"Example focus plan from FaceAtlas AI (Client 007).\" tabindex=\"0\">\n<table id=\"table-faceatlas-example\">\n<caption><span>Example focus plan from FaceAtlas AI (Client 007).<\/span><\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Zone<\/th>\n<th scope=\"col\">Side<\/th>\n<th scope=\"col\">Depth to SMAS<\/th>\n<th scope=\"col\">Linear focus (mm)<\/th>\n<th scope=\"col\">Dot focus (mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td data-sr-cell=\"faceatlas-example-0-0\" data-label=\"Zone\">Mid\/lower face<\/td>\n<td data-sr-cell=\"faceatlas-example-0-1\" data-label=\"Side\">Right<\/td>\n<td data-sr-cell=\"faceatlas-example-0-2\" data-label=\"Depth to SMAS\">5.0 mm<\/td>\n<td data-sr-cell=\"faceatlas-example-0-3\" data-label=\"Linear focus (mm)\">4.5, 3.0<\/td>\n<td data-sr-cell=\"faceatlas-example-0-4\" data-label=\"Dot focus (mm)\">4.5, 3.0, 2.0<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"faceatlas-example-1-0\" data-label=\"Zone\">Mid\/lower face<\/td>\n<td data-sr-cell=\"faceatlas-example-1-1\" data-label=\"Side\">Left<\/td>\n<td data-sr-cell=\"faceatlas-example-1-2\" data-label=\"Depth to SMAS\">4.3 mm<\/td>\n<td data-sr-cell=\"faceatlas-example-1-3\" data-label=\"Linear focus (mm)\">3.0<\/td>\n<td data-sr-cell=\"faceatlas-example-1-4\" data-label=\"Dot focus (mm)\">3.0, 2.0<\/td>\n<\/tr>\n<tr class=\"sr-hifu-group\">\n<td data-sr-cell=\"faceatlas-example-2-0\" data-label=\"Zone\">Upper neck<\/td>\n<td data-sr-cell=\"faceatlas-example-2-1\" data-label=\"Side\">Center<\/td>\n<td data-sr-cell=\"faceatlas-example-2-2\" data-label=\"Depth to SMAS\">6.1 mm<\/td>\n<td data-sr-cell=\"faceatlas-example-2-3\" data-label=\"Linear focus (mm)\">4.5, 3.0<\/td>\n<td data-sr-cell=\"faceatlas-example-2-4\" data-label=\"Dot focus (mm)\">6.0, 3.0<\/td>\n<\/tr>\n<tr class=\"sr-hifu-group\">\n<td data-sr-cell=\"faceatlas-example-3-0\" data-label=\"Zone\">Neck<\/td>\n<td data-sr-cell=\"faceatlas-example-3-1\" data-label=\"Side\">Right<\/td>\n<td data-sr-cell=\"faceatlas-example-3-2\" data-label=\"Depth to SMAS\">3.6 mm<\/td>\n<td data-sr-cell=\"faceatlas-example-3-3\" data-label=\"Linear focus (mm)\">3.0<\/td>\n<td data-sr-cell=\"faceatlas-example-3-4\" data-label=\"Dot focus (mm)\">3.0, 2.0<\/td>\n<\/tr>\n<tr>\n<td data-sr-cell=\"faceatlas-example-4-0\" data-label=\"Zone\">Neck<\/td>\n<td data-sr-cell=\"faceatlas-example-4-1\" data-label=\"Side\">Left<\/td>\n<td data-sr-cell=\"faceatlas-example-4-2\" data-label=\"Depth to SMAS\">2.4 mm<\/td>\n<td data-sr-cell=\"faceatlas-example-4-3\" data-label=\"Linear focus (mm)\">\u2013<\/td>\n<td data-sr-cell=\"faceatlas-example-4-4\" data-label=\"Dot focus (mm)\">2.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div data-sr-prose-slot=\"faceatlas-example-note\">\n<p>Here the two sides disagree in both zones. The right mid\/lower face reads 5.0 mm and takes the 4.5 mm focus; the left reads 4.3 mm and stops at 3.0 mm. The right neck reads 3.6 mm and takes the 3.0 mm focus; the left reads 2.4 mm and gets a 2.0 mm Dot focus only. At Finish scan FaceAtlas asks \u201cLeft and right focal depths differ for mid\/lower face and neck. Remeasure?\u201d and offers the shallower side, here the left, for a second reading before the first pulse.<\/p>\n<\/div>\n<div data-sr-prose-slot=\"faceatlas-expert\">\n<p>The Classic protocol covers the upper face, mid\/lower face, upper neck and neck. For a full-face record, the Expert protocol measures depth to SMAS on the right and left at nine named sites: the forehead, the superior temporal ligament attachment, the zygomatic, buccal-maxillary, masseteric cutaneous and mandibular retaining ligament regions, the buccal fat pad region, the submental region and the neck. Each visit ends in a Facial Ultrasound Assessment PDF with one-click comparison to earlier visits, shared by email, Drive or print.<\/p>\n<\/div>\n<div class=\"sr-hifu-gallery\">\n<figure><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-faceatlas-map.webp\" width=\"900\" height=\"1120\" alt=\"FaceAtlas AI facial region map\" loading=\"lazy\" decoding=\"async\"><figcaption>FaceAtlas AI facial region map<\/figcaption><\/figure>\n<figure><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-faceatlas-layers.webp\" width=\"1097\" height=\"540\" alt=\"FaceAtlas AI labeling skin, fat and SMAS on a live scan frame\" loading=\"lazy\" decoding=\"async\"><figcaption>FaceAtlas AI labeling skin, fat and SMAS on a live scan frame<\/figcaption><\/figure>\n<figure><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-faceatlas-report.webp\" width=\"1600\" height=\"1132\" alt=\"FaceAtlas AI report page: left mid\/lower face, depth to SMAS 3.5 mm\" loading=\"lazy\" decoding=\"async\"><figcaption>FaceAtlas AI report page: left mid\/lower face, depth to SMAS 3.5 mm<\/figcaption><\/figure>\n<\/div>\n<\/section>\n<section id=\"probes\">\n<h2>Suresult probes for HIFU depth planning<\/h2>\n<div data-sr-prose-slot=\"pro-intro\">\n<p>Each Pro probe pairs a 256-element, 25 mm linear array with a 4,400 mAh battery (4 hours of scanning) in a 145 g body, and each includes three months of FaceAtlas AI. Frequency sets how deep a probe reads and how fine the first millimeters look.<\/p>\n<\/div>\n<section class=\"sr-choice sr-hifu-model sr-hifu-pro\" data-sr-device-slot=\"L20Pro\" data-sr-maker=\"suresult\" id=\"model-l20pro\">\n<div class=\"sr-hifu-pro-layout\">\n<figure class=\"sr-hifu-photo\"><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-l20pro.webp\" width=\"1000\" height=\"1000\" alt=\"Suresult L20Pro wireless linear ultrasound probe with tablet\" loading=\"lazy\" decoding=\"async\"><\/figure>\n<div class=\"sr-hifu-card-text\">\n<h3>Suresult L20Pro<\/h3>\n<div data-sr-prose-slot=\"card-l20pro\">\n<p><strong>16\/20 MHz, 10\u201340 mm.<\/strong> One probe for the whole HIFU plan: forehead, temple, mid-face, jowl, submental area and neck. The 40 mm window takes in heavy submental fat, and Needle Enhance with Color, Power and PW Doppler covers the filler and vessel work around it. My pick for a HIFU practice.<\/p>\n<\/div>\n<p class=\"sr-hifu-spec\">3 months of FaceAtlas AI included \u00b7 256 elements \u00b7 145 g \u00b7 4 hours of scanning per charge<\/p>\n<p class=\"sr-hifu-price\">{{SRX_PRICE:31250}}<\/p>\n<p><a class=\"sr-buy-cta\" href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l20pro-16-20mhz-high-frequency-linear-probe-ultrasound\/\">View the L20Pro<\/a>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"sr-choice sr-hifu-model sr-hifu-pro\" data-sr-device-slot=\"L24Pro\" data-sr-maker=\"suresult\" id=\"model-l24pro\">\n<div class=\"sr-hifu-pro-layout\">\n<figure class=\"sr-hifu-photo\"><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-l24pro.webp\" width=\"1000\" height=\"1000\" alt=\"Suresult L24Pro wireless linear ultrasound probe with tablet\" loading=\"lazy\" decoding=\"async\"><\/figure>\n<div class=\"sr-hifu-card-text\">\n<h3>Suresult L24Pro<\/h3>\n<div data-sr-prose-slot=\"card-l24pro\">\n<p><strong>18\/24 MHz, 10\u201325 mm.<\/strong> The top frequency of the family, for thin tissue: the forehead over the frontal bone, the temple and a lean neck. On the neck FaceAtlas AI suggests a 2.0 mm Dot focus from 2.0 to 3.4 mm to SMAS and adds the 3.0 mm focus from 3.5 mm, so a tenth of a millimeter changes the plan. 24 MHz is the frequency Meng&#8217;s team used to map facial skin site by site.<\/p>\n<\/div>\n<p class=\"sr-hifu-spec\">3 months of FaceAtlas AI included \u00b7 256 elements \u00b7 145 g \u00b7 4 hours of scanning per charge<\/p>\n<p class=\"sr-hifu-price\">{{SRX_PRICE:30649}}<\/p>\n<p><a class=\"sr-buy-cta\" href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l24-pro-18-24mhz-high-frequency-linear-probe-ultrasound\/\">View the L24Pro<\/a>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"sr-choice sr-hifu-model sr-hifu-pro\" data-sr-device-slot=\"L14Pro\" data-sr-maker=\"suresult\" id=\"model-l14pro\">\n<div class=\"sr-hifu-pro-layout\">\n<figure class=\"sr-hifu-photo\"><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-l14pro.webp\" width=\"1000\" height=\"1000\" alt=\"Suresult L14Pro wireless linear ultrasound probe with tablet\" loading=\"lazy\" decoding=\"async\"><\/figure>\n<div class=\"sr-hifu-card-text\">\n<h3>Suresult L14Pro<\/h3>\n<div data-sr-prose-slot=\"card-l14pro\">\n<p><strong>10\/14 MHz, 20\u201380 mm.<\/strong> The deep window of the family, for heavy submental fat and the 6 mm and deeper cartridges of body contouring on the abdomen and thighs. MSK, thyroid, breast and vascular scans run on the same probe.<\/p>\n<\/div>\n<p class=\"sr-hifu-spec\">3 months of FaceAtlas AI included \u00b7 256 elements \u00b7 145 g \u00b7 4 hours of scanning per charge<\/p>\n<p class=\"sr-hifu-price\">{{SRX_PRICE:31438}}<\/p>\n<p><a class=\"sr-buy-cta\" href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l14pro-10-14mhz-high-frequency-linear-probe-ultrasound\/\">View the L14Pro<\/a>\n<\/div>\n<\/div>\n<\/section>\n<div data-sr-prose-slot=\"pro-compliance\">\n<p>Every Suresult L-series probe carries an IP67 rating (dust-tight and waterproof), is drop-tested and is 510(k)-cleared under K211321. Imaging runs in the free Suresult app on iOS, Android and Windows: B-mode, M-mode, Color, Power and PW Doppler, plus DICOM export.<\/p>\n<\/div>\n<section id=\"siblings\" data-sr-maker=\"suresult\">\n<h3>L20, L24 and L14: the 192-element siblings<\/h3>\n<div data-sr-prose-slot=\"siblings\">\n<p>The L20, L24 and L14 share the Pro frequencies and depth windows with 192 elements and 2 hours of scanning per charge: the L20 at {{SRX_STORE:28582}}, the L24 at {{SRX_PRICE:28675}} and the L14 at {{SRX_PRICE:28577}}. FaceAtlas AI runs on all three with a <a href=\"https:\/\/suresultmed.com\/shop\/software-ai\/faceatlas-ai-monthly-license-ai-skin-ultrasound-software\/\">license<\/a>: {{SRX_STORE:36381}} a month, {{SRX_STORE:36382}} a year, or {{SRX_STORE:36383}} for the <a href=\"https:\/\/suresultmed.com\/shop\/software-ai\/faceatlas-ai-lifetime-license-ai-skin-ultrasound-software\/\">lifetime license<\/a>, on sale until 11:59 PM Pacific Time, December 31, 2026.<\/p>\n<\/div>\n<div class=\"sr-hifu-sibling-row\">\n<section class=\"sr-choice sr-hifu-model sr-hifu-sibling\" data-sr-device-slot=\"L20\" data-sr-maker=\"suresult\" id=\"model-l20\">\n<figure class=\"sr-hifu-photo\"><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-l20-v2.webp\" width=\"1000\" height=\"1000\" alt=\"Suresult L20 wireless linear ultrasound probe with tablet\" loading=\"lazy\" decoding=\"async\"><\/figure>\n<h4>Suresult L20<\/h4>\n<p class=\"sr-hifu-spec\">192 elements \u00b7 16\/20 MHz \u00b7 10\u201340 mm \u00b7 Needle Enhance<\/p>\n<p class=\"sr-hifu-price\">{{SRX_STORE:28582}}<\/p>\n<p><a class=\"sr-buy-cta\" href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l20-high-frequency-16-20-mhz-linear-wireless-ultrasound-for-msk-skin-and-facial-plastic-surgery-injections\/\">View the L20<\/a><br \/>\n<\/section>\n<section class=\"sr-choice sr-hifu-model sr-hifu-sibling\" data-sr-device-slot=\"L24\" data-sr-maker=\"suresult\" id=\"model-l24\">\n<figure class=\"sr-hifu-photo\"><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-l24.webp\" width=\"1000\" height=\"1000\" alt=\"Suresult L24 wireless linear ultrasound probe with tablet\" loading=\"lazy\" decoding=\"async\"><\/figure>\n<h4>Suresult L24<\/h4>\n<p class=\"sr-hifu-spec\">192 elements \u00b7 18\/24 MHz \u00b7 10\u201325 mm \u00b7 Needle Enhance<\/p>\n<p class=\"sr-hifu-price\">{{SRX_PRICE:28675}}<\/p>\n<p><a class=\"sr-buy-cta\" href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l24-high-frequency-linear-probe-ultrasound\/\">View the L24<\/a><br \/>\n<\/section>\n<section class=\"sr-choice sr-hifu-model sr-hifu-sibling\" data-sr-device-slot=\"L14\" data-sr-maker=\"suresult\" id=\"model-l14\">\n<figure class=\"sr-hifu-photo\"><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-l14.webp\" width=\"1000\" height=\"1000\" alt=\"Suresult L14 wireless linear ultrasound probe with tablet\" loading=\"lazy\" decoding=\"async\"><\/figure>\n<h4>Suresult L14<\/h4>\n<p class=\"sr-hifu-spec\">192 elements \u00b7 10\/14 MHz \u00b7 20\u201380 mm<\/p>\n<p class=\"sr-hifu-price\">{{SRX_PRICE:28577}}<\/p>\n<p><a class=\"sr-buy-cta\" href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l14-linear-wireless-ultrasound-high-frequency-imaging\/\">View the L14<\/a><br \/>\n<\/section>\n<\/div>\n<figure class=\"sr-video\" data-sr-exact-model-video=\"Suresult L14\" data-sr-owned-video=\"afYp8uF5IC8\"><button type=\"button\" class=\"sr-video-poster\" aria-label=\"Suresult L14 at 14 MHz, live in the temple: superficial temporal artery and a cannula\" onclick=\"this.hidden=true;const f=this.nextElementSibling;f.src=f.dataset.src;f.hidden=false;\"><img src=\"https:\/\/suresultmed.com\/wp-content\/uploads\/aesthetic-ultrasound-cost-l14-14mhz-full-interface-91s.webp\" width=\"1280\" height=\"720\" alt=\"Suresult L14 at 14 MHz, live in the temple: superficial temporal artery and a cannula\" loading=\"lazy\" decoding=\"async\"><svg viewBox=\"0 0 64 64\" aria-hidden=\"true\"><circle cx=\"32\" cy=\"32\" r=\"30\" fill=\"#102c25\"\/><path d=\"M26 18L46 32L26 46Z\" fill=\"white\"\/><\/svg><\/button><iframe src=\"https:\/\/www.youtube-nocookie.com\/embed\/afYp8uF5IC8\" loading=\"lazy\" data-src=\"https:\/\/www.youtube-nocookie.com\/embed\/afYp8uF5IC8?autoplay=1&#038;start=91\" title=\"Suresult L14 at 14 MHz, live in the temple: superficial temporal artery and a cannula\" width=\"960\" height=\"540\" allow=\"autoplay; encrypted-media; picture-in-picture\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen hidden><\/iframe><figcaption><a href=\"https:\/\/www.youtube.com\/watch?v=afYp8uF5IC8\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Suresult L14 at 14 MHz, live in the temple: superficial temporal artery and a cannula<\/a><\/figcaption><\/figure>\n<\/section>\n<section id=\"pads\">\n<h3>Coupling pads<\/h3>\n<div data-sr-prose-slot=\"pads\">\n<p>Suresult&#8217;s sterile gel pads, \u00d8 35 \u00d7 4 mm, sit between probe and skin as a 4 mm stand-off for sharper skin-layer images: one pad per client and no gel to wipe off. A pack of 50 costs {{SRX_PRICE:36977}}.<\/p>\n<\/div>\n<p><a class=\"sr-buy-cta\" role=\"button\" href=\"https:\/\/suresultmed.com\/shop\/accessories\/aesthetic-ultrasound-gel-pads\/\">See the gel pads<\/a><\/p>\n<\/section>\n<\/section>\n<section id=\"start\">\n<h2>Where to start<\/h2>\n<div data-sr-prose-slot=\"start\">\n<p>For HIFU planning across the face and neck, I recommend the L20Pro at {{SRX_PRICE:31250}}. For thin foreheads, temples and lean necks, I choose the L24Pro at {{SRX_PRICE:30649}}. For a clinic that adds body HIFU or MSK work, my pick is the L14Pro at {{SRX_PRICE:31438}}. All three include three months of FaceAtlas AI, a 30-day trial and a two-year warranty, and the checkout price covers shipping, customs clearance, duties and taxes: No Hidden Fees.<\/p>\n<\/div>\n<div class=\"sr-hifu-buy\">\n<a class=\"sr-buy-cta\" role=\"button\" href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l20pro-16-20mhz-high-frequency-linear-probe-ultrasound\/\">Suresult L20Pro<\/a><br \/>\n<a class=\"sr-buy-cta\" role=\"button\" href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l24-pro-18-24mhz-high-frequency-linear-probe-ultrasound\/\">Suresult L24Pro<\/a><br \/>\n<a class=\"sr-buy-cta\" role=\"button\" href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l14pro-10-14mhz-high-frequency-linear-probe-ultrasound\/\">Suresult L14Pro<\/a>\n<\/div>\n<\/section>\n<section id=\"faq\">\n<h2>HIFU depth questions<\/h2>\n<details class=\"sr-hifu-faq\">\n<summary data-sr-prose-slot=\"faq-q1\">What depth does each HIFU cartridge treat?<\/summary>\n<p data-sr-prose-slot=\"faq-a1\">The number on the cartridge is its focal depth below the skin surface. In published protocols the 1.5 mm cartridge targets the superficial dermis, the 2.0 mm treats the forehead, lips and neck superficially, the 3.0 mm targets the deeper dermis and the dermal-to-subcutaneous layer, and the 4.5 mm the SMAS and deep fat. Cartridges of 6 mm and deeper treat the temporal fat pad of the hair-bearing temple and body fat on the abdomen and thighs.<\/p>\n<\/details>\n<details class=\"sr-hifu-faq\">\n<summary data-sr-prose-slot=\"faq-q2\">How deep is the SMAS in the face?<\/summary>\n<p data-sr-prose-slot=\"faq-a2\">It changes with the site and the person. In Yi&#x27;s 2026 trial of women aged 60 to 72, skin-to-SMAS distance averaged 3.98 to 4.08 mm at the jowl and 4.32 to 4.42 mm under the chin, with standard deviations of 0.44 to 0.62 mm. On the forehead the SMAS continues as the galea aponeurotica around the frontalis (Zattar 2024); in Zhuang&#x27;s survey of 238 adults the skin and subcutaneous tissue above the frontalis measure 2.4 mm in the leanest BMI group and 3.6 mm in the heaviest, and the frontal bone lies 3.1 to 4.4 mm below the skin.<\/p>\n<\/details>\n<details class=\"sr-hifu-faq\">\n<summary data-sr-prose-slot=\"faq-q3\">When should I use the 4.5 mm cartridge instead of the 3.0 mm?<\/summary>\n<p data-sr-prose-slot=\"faq-a3\">When the SMAS sits deep enough to hold the 4.5 mm focus. In Yi&#x27;s anatomy-guided arm, a skin-to-SMAS distance of 4.2 mm or more called for mainly 4.5 mm lines, a distance under 4.0 mm for mainly 3.0 mm lines, and deep fat of 3.5 mm or more raised the share of 4.5 mm lines. FaceAtlas AI suggests the 4.5 mm focus on the mid\/lower face once depth to SMAS reads 4.5 mm.<\/p>\n<\/details>\n<details class=\"sr-hifu-faq\">\n<summary data-sr-prose-slot=\"faq-q4\">Can I use the 4.5 mm cartridge on the forehead?<\/summary>\n<p data-sr-prose-slot=\"faq-a4\">Published protocols keep it off the forehead. Kim (2024) treated the forehead with 1.5 mm and 2 mm cartridges, passed the 3 mm cartridge over it only weakly and without direct shots, because strong 3 mm shots over the frontal bone were painful, and used no 4.5 mm there; Lio (2022) used a 2 mm cartridge at 0.3 to 0.4 J. The five layers above the frontal bone total 3.1 to 4.4 mm across BMI groups (Zhuang 2025), which puts a 4.5 mm focus at or below the bone and a 3.0 mm focus close to it on a lean forehead.<\/p>\n<\/details>\n<details class=\"sr-hifu-faq\">\n<summary data-sr-prose-slot=\"faq-q5\">What ultrasound frequency do I need to measure SMAS depth?<\/summary>\n<p data-sr-prose-slot=\"faq-a5\">A high-frequency linear probe. The studies behind this chart measured facial layers with linear probes of up to 33 MHz (15 MHz on the forehead, 24 MHz for facial skin and 24 to 33 MHz for the SMAS), and Ultherapy&#x27;s DeepSEE images at 12 to 25 MHz down to 8 mm. The Suresult L20Pro scans at 16\/20 MHz to 40 mm and the L24Pro at 18\/24 MHz to 25 mm, and FaceAtlas AI labels skin, fat and SMAS on both.<\/p>\n<\/details>\n<details class=\"sr-hifu-faq\">\n<summary data-sr-prose-slot=\"faq-q6\">Does probe pressure change the depth reading?<\/summary>\n<p data-sr-prose-slot=\"faq-a6\">Yes. Pressure compresses the tissue above the SMAS: Zhu&#x27;s team puts handpiece compression at about 80%, which brings lower-face tissue of 5 to 7 mm to 4 to 5.6 mm. Take the planning reading at rest, with a generous layer of gel or a coupling pad and the lightest contact that keeps the image full, as Yi, Zhu and Zhuang did.<\/p>\n<\/details>\n<details class=\"sr-hifu-faq\">\n<summary data-sr-prose-slot=\"faq-q7\">What is the difference between Linear and Dot HIFU cartridges?<\/summary>\n<p data-sr-prose-slot=\"faq-a7\">A linear cartridge fires a row of focal points along a line; a dot handpiece fires single points. In Zhu&#x27;s 2024 study the dot focal area was about three times the diameter of the linear one (2 to 3 mm against 0.7 mm) and heated tissue to 50 to 60 \u00b0C, and the team used dot handpieces on the perioral and preauricular areas, where the mental nerve and facial nerve branches run.<\/p>\n<\/details>\n<details class=\"sr-hifu-faq\">\n<summary data-sr-prose-slot=\"faq-q8\">What does FaceAtlas AI suggest for HIFU, and which probes run it?<\/summary>\n<p data-sr-prose-slot=\"faq-a8\">FaceAtlas AI measures depth to SMAS at each site and suggests Linear focus depths of 4.5 or 3.0 mm and Dot focus depths of 6.0, 4.5, 3.0 or 2.0 mm for the mid\/lower face, upper neck and neck. When the left and right sides call for different depths, it asks for a rescan before treatment. It runs on the Suresult L14, L20 and L24 and their Pro versions; the L14Pro, L20Pro and L24Pro include three months, and a license costs {{SRX_STORE:36381}} a month, {{SRX_STORE:36382}} a year or {{SRX_STORE:36383}} for life.<\/p>\n<\/details>\n<details class=\"sr-hifu-faq\">\n<summary data-sr-prose-slot=\"faq-q9\">Does HIFU work for patients over 60?<\/summary>\n<p data-sr-prose-slot=\"faq-a9\">Yi&#x27;s 2026 randomized trial treated women aged 60 to 72 in three sessions four weeks apart. At week 16, 6 of 10 women treated from measured depth and 4 of 10 on the fixed protocol were rated much improved or better, and satisfaction was favorable in both arms.<\/p>\n<\/details>\n<\/section>\n<section id=\"related\">\n<h2>Related guides<\/h2>\n<ul>\n<li><a href=\"\/aesthetic-ultrasound-cost\/\">Aesthetic ultrasound cost: probe, AI software and the five-year total<\/a><\/li>\n<li><a href=\"\/best-aesthetic-ultrasound-machines-for-facial-fillers\/\">Aesthetic ultrasound machines for facial fillers, compared<\/a><\/li>\n<li><a href=\"\/l20-vs-l24-aesthetic-ultrasound\/\">L14, L20 and L24 model chooser<\/a><\/li>\n<li><a href=\"\/ultrasound-guided-filler-injections\/\">Ultrasound-guided filler injections<\/a><\/li>\n<li><a href=\"\/ultrasound-for-med-spas\/\">Ultrasound for med spas<\/a><\/li>\n<li><a href=\"\/high-frequency-ultrasound-machine\/\">High-frequency ultrasound machines<\/a><\/li>\n<li><a href=\"\/specialty\/handheld-ultrasound-for-aesthetics\/\">Handheld ultrasound for aesthetics<\/a><\/li>\n<\/ul>\n<\/section>\n<section id=\"sources\">\n<h2>Sources<\/h2>\n<ol>\n<li><a href=\"https:\/\/doi.org\/10.1038\/s41598-026-61092-7\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Yi KH, Park Y, Song JK, et al. Individualized HIFU in women over 60: ultrasound assessment of layer-specific facial soft-tissue thickness changes. Sci Rep. 2026;16:32777.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/doi.org\/10.1007\/s13555-023-01078-9\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Zhu J, Han Y, Liu Y, et al. Evaluation of a novel microfocused ultrasound with three-dimensional digital imaging for facial tightening: a prospective, randomized, controlled trial. Dermatol Ther (Heidelb). 2024;14(1):233\u2013249.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/doi.org\/10.1097\/GOX.0000000000006203\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Kim JS. Three-dimensional analysis of lifting effects after high-intensity focused ultrasound (Ultraformer-MPT) across seven facial aesthetic units considering sonoanatomy. Plast Reconstr Surg Glob Open. 2024;12(10):e6203.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/doi.org\/10.2147\/CCID.S350556\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Lio ML, Chang CC, Chuang ADC, et al. Quantified facial rejuvenation utilizing high intense focus ultrasound with multiple penetrative depths. Clin Cosmet Investig Dermatol. 2022;15:489\u2013496.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/doi.org\/10.1093\/asjof\/ojaf140\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Zhuang J, Yuan L, Lin Z, et al. An analysis of the factors influencing forehead soft-tissue thickness: an ultrasound study. Aesthet Surg J Open Forum. 2025;7:ojaf140.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/doi.org\/10.1590\/0100-3984.2024.0035\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Zattar LC, Faria G, Boggio R. U-SMAS: ultrasound findings of the superficial musculoaponeurotic system. Radiol Bras. 2024;57:e20240035.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/doi.org\/10.1111\/srt.13426\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Jeong KM, Seo JY, Kim A, et al. Ultrasonographic analysis of facial skin thickness in relation to age, site, sex, and body mass index. Skin Res Technol. 2023;29:e13426.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/doi.org\/10.1186\/s12880-022-00839-w\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Meng Y, Feng L, Shan J, et al. Application of high-frequency ultrasound to assess facial skin thickness in association with gender, age, and BMI in healthy adults. BMC Med Imaging. 2022;22:113.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/ultherapy.com\/app\/uploads\/2023\/02\/1015107_Ultherapy_IFU_RevC_2023.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Ultherapy Instructions for Use 1015107 Rev C.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/ultherapy.com\/app\/themes\/ultherapy2020\/pdfs\/ultherapy-prime-instructions-for-use.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Ultherapy PRIME Instructions for Use.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/ultherapy.com\/physicians\/a-deeper-nonsurgical-lift\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Ultherapy for physicians: a deeper nonsurgical lift.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/ultherapy.com\/physicians\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Ultherapy for physicians.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/store.clarius.com\/products\/l20-hd3-handheld-ultrasound-scanner\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Clarius L20 HD3.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/clarius.com\/specialties\/aesthetics\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Clarius aesthetics.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/clarius.com\/technology\/t-mode\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Clarius T-Mode.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/hironic-eu.com\/Doublo\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Hironic Doublo.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l20pro-16-20mhz-high-frequency-linear-probe-ultrasound\/\">Suresult L20Pro.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l24-pro-18-24mhz-high-frequency-linear-probe-ultrasound\/\">Suresult L24Pro.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l14pro-10-14mhz-high-frequency-linear-probe-ultrasound\/\">Suresult L14Pro.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l20-high-frequency-16-20-mhz-linear-wireless-ultrasound-for-msk-skin-and-facial-plastic-surgery-injections\/\">Suresult L20.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l24-high-frequency-linear-probe-ultrasound\/\">Suresult L24.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/handheld-ultrasounds\/l14-linear-wireless-ultrasound-high-frequency-imaging\/\">Suresult L14.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/software-ai\/faceatlas-ai-monthly-license-ai-skin-ultrasound-software\/\">FaceAtlas AI monthly license.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/software-ai\/faceatlas-ai-yearly-license-ai-skin-ultrasound-software\/\">FaceAtlas AI yearly license.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/software-ai\/faceatlas-ai-lifetime-license-ai-skin-ultrasound-software\/\">FaceAtlas AI lifetime license.<\/a> \u2014 October 27, 2026<\/li>\n<li><a href=\"https:\/\/suresultmed.com\/shop\/accessories\/aesthetic-ultrasound-gel-pads\/\">Suresult aesthetic ultrasound gel pads.<\/a> \u2014 October 27, 2026<\/li>\n<\/ol>\n<\/section>\n<nav aria-label=\"HIFU depth chart navigation\" class=\"sr-light-toc sr-sticky-toc sr-article-toc\" data-sr-hide-on-wide-table=\"\" data-suresult-toc=\"\" id=\"sr-hifu-toc\">\n<div class=\"sr-light-toc__head\">\n<div class=\"sr-light-toc__title\">On this page<\/div>\n<p><span class=\"sr-light-toc__progress\" id=\"sr-hifu-progress\">0%<\/span><\/p>\n<\/div>\n<div class=\"sr-light-toc__links\"><a href=\"#quick-answer\">Quick Answer<\/a><a href=\"#quick-list\">The Quick List<\/a><a href=\"#routes\">Three routes<\/a><a href=\"#cartridges\">Cartridge depths<\/a><a href=\"#sites\">Depth by site<\/a><a href=\"#why\">Why measure<\/a><a href=\"#measure\">How to measure<\/a><a href=\"#faceatlas\">FaceAtlas AI<\/a><a href=\"#probes\">Suresult probes<\/a><a href=\"#start\">Where to start<\/a><a href=\"#faq\">FAQ<\/a><a href=\"#sources\">Sources<\/a><\/div>\n<p><button class=\"sr-crisp-consult-btn\" data-sr-crisp-open=\"\" onclick=\"window.$crisp=window.$crisp||[];window.$crisp.push(['do','chat:open']);\" type=\"button\">ONLINE EXPERT CONSULT<\/button><\/p>\n<\/nav>\n<\/div>\n<p><script data-cfasync=\"false\" data-nitro-exclude=\"\">(function(){var nav=document.getElementById(\"sr-hifu-toc\");if(!nav)return;var links=[].slice.call(nav.querySelectorAll('a[href^=\"#\"]'));var map={},order=[];links.forEach(function(a){var id=a.getAttribute(\"href\").slice(1);var el=document.getElementById(id);if(el){map[id]=a;order.push(el)}});function setActive(a){if(!a)return;links.forEach(function(l){l.classList.remove(\"sr-toc-active\")});a.classList.add(\"sr-toc-active\")}function activeFromScroll(){var mark=scrollY+innerHeight*0.18,best=null;order.forEach(function(el){if(el.getBoundingClientRect().top+scrollY<=mark)best=el});if(!best){if(order.length){best=order[0]}}if(best)setActive(map[best.id])}if(\"IntersectionObserver\"in window){var io=new IntersectionObserver(function(es){es.forEach(function(e){if(e.isIntersecting)setActive(map[e.target.id])})},{rootMargin:\"-12% 0px -72% 0px\"});order.forEach(function(el){io.observe(el)})}var pct=document.getElementById(\"sr-hifu-progress\"),tick=false;function onScroll(){if(tick)return;tick=true;requestAnimationFrame(function(){if(pct){var max=document.documentElement.scrollHeight-innerHeight;pct.textContent=(max>0?Math.min(100,Math.round(scrollY\/max*100)):0)+\"%\"}activeFromScroll();tick=false})}window.addEventListener(\"scroll\",onScroll,{passive:true});activeFromScroll();})();<\/script><br \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"Article\", \"@id\": \"https:\/\/suresultmed.com\/hifu-depth-ultrasound\/#article\", \"headline\": \"HIFU Depth Chart by Facial Site: Measure SMAS Depth Before You Choose the 4.5, 3.0 or 2.0 mm Cartridge\", \"description\": \"HIFU depth chart by facial site: published SMAS depths, the cartridges used at each, the 4.2 mm rule from a 2026 trial, and how to measure before treating.\", \"url\": \"https:\/\/suresultmed.com\/hifu-depth-ultrasound\/\", \"mainEntityOfPage\": \"https:\/\/suresultmed.com\/hifu-depth-ultrasound\/\", \"datePublished\": \"2026-10-27T07:30:48Z\", \"dateModified\": \"2026-10-27T07:30:48Z\", \"author\": [{\"@type\": \"Person\", \"name\": \"Fernando Mariz, MD\", \"url\": \"https:\/\/www.maidenlanemedical.com\/doctors\/fernando-mariz\/\", \"image\": \"https:\/\/suresultmed.com\/wp-content\/uploads\/fernando-mariz-md-author-avatar.png\", \"jobTitle\": \"Gynecology, pelvic surgery, women\u2019s health and sonography\"}, {\"@type\": \"Person\", \"name\": \"Jailyn Avila, MD\", \"url\": \"https:\/\/jailynavila.com\/\", \"image\": \"https:\/\/suresultmed.com\/wp-content\/uploads\/jailyn-avila-md-author-avatar.png\", \"jobTitle\": \"Emergency medicine, POCUS education and digital health\"}], \"publisher\": {\"@type\": \"Organization\", \"name\": \"Suresult\", \"url\": \"https:\/\/suresultmed.com\/\"}, \"image\": {\"@type\": \"ImageObject\", \"url\": \"https:\/\/suresultmed.com\/wp-content\/uploads\/hifu-depth-ultrasound-cover.webp\", \"width\": 1600, \"height\": 900}}, {\"@type\": \"FAQPage\", \"@id\": \"https:\/\/suresultmed.com\/hifu-depth-ultrasound\/#faq\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What depth does each HIFU cartridge treat?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The number on the cartridge is its focal depth below the skin surface. In published protocols the 1.5 mm cartridge targets the superficial dermis, the 2.0 mm treats the forehead, lips and neck superficially, the 3.0 mm targets the deeper dermis and the dermal-to-subcutaneous layer, and the 4.5 mm the SMAS and deep fat. Cartridges of 6 mm and deeper treat the temporal fat pad of the hair-bearing temple and body fat on the abdomen and thighs.\"}}, {\"@type\": \"Question\", \"name\": \"How deep is the SMAS in the face?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It changes with the site and the person. In Yi's 2026 trial of women aged 60 to 72, skin-to-SMAS distance averaged 3.98 to 4.08 mm at the jowl and 4.32 to 4.42 mm under the chin, with standard deviations of 0.44 to 0.62 mm. On the forehead the SMAS continues as the galea aponeurotica around the frontalis (Zattar 2024); in Zhuang's survey of 238 adults the skin and subcutaneous tissue above the frontalis measure 2.4 mm in the leanest BMI group and 3.6 mm in the heaviest, and the frontal bone lies 3.1 to 4.4 mm below the skin.\"}}, {\"@type\": \"Question\", \"name\": \"When should I use the 4.5 mm cartridge instead of the 3.0 mm?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"When the SMAS sits deep enough to hold the 4.5 mm focus. In Yi's anatomy-guided arm, a skin-to-SMAS distance of 4.2 mm or more called for mainly 4.5 mm lines, a distance under 4.0 mm for mainly 3.0 mm lines, and deep fat of 3.5 mm or more raised the share of 4.5 mm lines. FaceAtlas AI suggests the 4.5 mm focus on the mid\/lower face once depth to SMAS reads 4.5 mm.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use the 4.5 mm cartridge on the forehead?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Published protocols keep it off the forehead. Kim (2024) treated the forehead with 1.5 mm and 2 mm cartridges, passed the 3 mm cartridge over it only weakly and without direct shots, because strong 3 mm shots over the frontal bone were painful, and used no 4.5 mm there; Lio (2022) used a 2 mm cartridge at 0.3 to 0.4 J. The five layers above the frontal bone total 3.1 to 4.4 mm across BMI groups (Zhuang 2025), which puts a 4.5 mm focus at or below the bone and a 3.0 mm focus close to it on a lean forehead.\"}}, {\"@type\": \"Question\", \"name\": \"What ultrasound frequency do I need to measure SMAS depth?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A high-frequency linear probe. The studies behind this chart measured facial layers with linear probes of up to 33 MHz (15 MHz on the forehead, 24 MHz for facial skin and 24 to 33 MHz for the SMAS), and Ultherapy's DeepSEE images at 12 to 25 MHz down to 8 mm. The Suresult L20Pro scans at 16\/20 MHz to 40 mm and the L24Pro at 18\/24 MHz to 25 mm, and FaceAtlas AI labels skin, fat and SMAS on both.\"}}, {\"@type\": \"Question\", \"name\": \"Does probe pressure change the depth reading?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. Pressure compresses the tissue above the SMAS: Zhu's team puts handpiece compression at about 80%, which brings lower-face tissue of 5 to 7 mm to 4 to 5.6 mm. Take the planning reading at rest, with a generous layer of gel or a coupling pad and the lightest contact that keeps the image full, as Yi, Zhu and Zhuang did.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between Linear and Dot HIFU cartridges?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A linear cartridge fires a row of focal points along a line; a dot handpiece fires single points. In Zhu's 2024 study the dot focal area was about three times the diameter of the linear one (2 to 3 mm against 0.7 mm) and heated tissue to 50 to 60 \u00b0C, and the team used dot handpieces on the perioral and preauricular areas, where the mental nerve and facial nerve branches run.\"}}, {\"@type\": \"Question\", \"name\": \"What does FaceAtlas AI suggest for HIFU, and which probes run it?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"FaceAtlas AI measures depth to SMAS at each site and suggests Linear focus depths of 4.5 or 3.0 mm and Dot focus depths of 6.0, 4.5, 3.0 or 2.0 mm for the mid\/lower face, upper neck and neck. When the left and right sides call for different depths, it asks for a rescan before treatment. It runs on the Suresult L14, L20 and L24 and their Pro versions; the L14Pro, L20Pro and L24Pro include three months, and a license costs {{SRX_STORE:36381}} a month, {{SRX_STORE:36382}} a year or {{SRX_STORE:36383}} for life.\"}}, {\"@type\": \"Question\", \"name\": \"Does HIFU work for patients over 60?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yi's 2026 randomized trial treated women aged 60 to 72 in three sessions four weeks apart. 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\u03ba\u03b5\u03c6\u03b1\u03bb\u03ad\u03c2 \u03b8\u03b5\u03c1\u03b1\u03c0\u03b5\u03af\u03b1\u03c2 \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03ba\u03ac\u03b8\u03b5 \u03c3\u03b7\u03bc\u03b5\u03af\u03bf, \u03bf \u03ba\u03b1\u03bd\u03cc\u03bd\u03b1\u03c2 \u03c4\u03c9\u03bd 4,2 mm \u03b1\u03c0\u03cc \u03bc\u03b9\u03b1 \u03bc\u03b5\u03bb\u03ad\u03c4\u03b7 \u03c4\u03bf\u03c5 2026 \u03ba\u03b1\u03b9 \u03c0\u03ce\u03c2 \u03bd\u03b1 \u03bc\u03b5\u03c4\u03c1\u03ac\u03c4\u03b5 \u03c0\u03c1\u03b9\u03bd \u03b1\u03c0\u03cc \u03c4\u03b7 \u03b8\u03b5\u03c1\u03b1\u03c0\u03b5\u03af\u03b1.<\/p>","protected":false},"author":1,"featured_media":37435,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"HIFU Depth Chart: SMAS Depth and Cartridge by Facial Site","_seopress_titles_desc":"HIFU depth chart by facial site: 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