Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, reaching...

https://www.runway-bookmarks.win/ultherapy-uses-focused-ultrasound-targeting-the-4-5-mm-smas-layer-for-deep-skin

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, reaching deeper than most RF treatments that heat skin to around 40 to 45°C. Compared to standard HIFU, Ultherapy delivers more precise energy for lifting