Ultherapy targets the 4.5 mm SMAS layer with focused ultrasound, reaching...

https://johnathanytzx289.image-perth.org/what-does-operator-dependent-mean-for-ultherapy-results

Ultherapy targets the 4.5 mm SMAS layer with focused ultrasound, reaching deeper than standard HIFU, which usually treats up to 3 mm. RF heats skin to about 40-45°C for collagen boost but stays more superficial