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

https://qqpipi.com//index.php/Is_Ultherapy_Safe_Around_Nerves_and_Bone_Because_of_Imaging%3F

Ultherapy uses focused ultrasound to target the 4.5 mm SMAS layer, helping lift and tighten deeper tissues. In contrast, RF heats skin to about 40-45°C mainly affecting surface collagen