High-Intensity Focused Ultrasound (HIFU) is a medical technology that uses focused ultrasound energy to target specific areas of tissue beneath the skin. It's commonly used for various medical and cosmetic procedures. HIFU machines can be used for non-invasive facelifts, body contouring, and treating certain medical conditions like prostate cancer and uterine fibroids. If you have specific questions about HIFU or its applications, please feel free to ask.