The Difference in One Line
HIFU focuses energy deep (including fascia) into coagulation points for “lifting”; Thermage-style monopolar RF heats full-thickness dermis and subcutis for “tightening” and texture.
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MEDICAL AESTHETICS · TECHNICAL GLOSSARY
HIFU focuses energy deep (including fascia) into coagulation points for “lifting”; Thermage-style monopolar RF heats full-thickness dermis and subcutis for “tightening” and texture.
| Dimension | HIFU | Thermage (Monopolar RF) |
|---|---|---|
| Energy physics | Ultrasound focus, mm-scale point | Impedance heating, volume distribution |
| Target layers | Selectable 4.5/3.0/1.5 mm | Full dermis to subcutis |
| Chief effect | Deep contraction, contour lifting | Full-thickness tightening, texture |
| Pain | Sharp, pronounced over bone | Deep sustained heat |
| Skin tone | No melanin dependence | No melanin dependence |
| Longevity | ~12-18 months | ~12-24 months |
| Key risks | Fat atrophy, nerve-zone misfire | Burns (pad/cooling failure) |
| Comfort strategy | Bone avoidance + titration | Pain feedback + cooling |
Neither depends on melanin — both are darker-skin friendly; neither replaces surgery for severe ptosis; both require calibrated output and trained operators, the core risk of grey-market devices being uncalibrated energy. On the RF side, LEIJEX offers the vacuum RF platform as a complementary configuration for clinics.
Contour-driven complaints: HIFU first. Texture and fine lines: RF first. An experienced physician assessing tissue beats an advertisement.
Some clinics do same-day split-face layering, but a 2-4 week interval is the conservative norm to observe responses and limit cumulative heating.
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