HIFU (high intensity focused ultrasound) high-energy focused ultrasound knife from Korea is a non-invasive (non-invasive) ultrasound technology that directly acts on the SMAS layer. HIFU's high intensity focused ultrasound technology is an ultrasonic surgical technology rising in the 1940s. It takes ultrasound as the energy source and uses its penetrability and focussability to focus the ultrasonic energy emitted by ultrasound on the human SMAS layer, forming a region with high sound intensity - focal region in the SMAS, It can go 3.0mm-4.5mm deep under the skin to make the temperature of SMAs tissue reach more than 65 ℃ in 0.5-1s (the strongest temperature of all non-invasive skin tightening instruments), so as to reorganize the collagen in SMAS tissue without damaging the normal tissue outside the focal area, so as to achieve the effect of fascia lifting.
What is ultrasonic (US)
（HIFU)
Ultrasonic technology refers to a kind of sound wave that people can't hear when the radio frequency is higher than 20000hz. It can vibrate 20000-1 billion times per second, which is generally generated by mechanical vibration.
What is the SMAS layer?
(HIFU)
Most skin pulling operations are performed by plastic surgeons. The operating layer is SMAS layer (superficial muscle fascia system, referred to as fascia layer). SMAS (fascia) layer is located in the skin, about 4.5mm deep, between subcutaneous fat and muscle.