Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, making it...

https://www.bookmark-friend.win/ultherapy-uses-focused-ultrasound-to-target-the-4-5-mm-smas-layer-unlike-rf

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, making it popular for deeper lifting compared to RF’s gentler 40 to 45°C heat which works mainly on the skin surface. Standard HIFU is similar but often less precise