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

https://wiki-mixer.win/index.php/What_Treatment_Works_for_Brow_Descent_Without_Looking_Overdone%3F

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