High-intensity focused ultrasound (HIFU) is a medical procedure that uses ultrasound waves to treat certain diseases such as tumors. This is a minimally invasive procedure. Ultrasound uses high-frequency sound waves to create real-time images or videos of internal organs or other soft tissues.
However, HIFU does not produce images. Instead, high-intensity, high-concentration sound waves interact with target tissues in the body to change or destroy them. It is similar to how a magnifying glass focuses sunlight on a target. With HIFU, multiple ultrasound beams are focused on the exact area of tissue that needs to be treated. The highly concentrated energy of ultrasound causes an increase in tissue temperature and the heat destroys (removes) the targeted tissue area.
Ultrasound rays can penetrate layers of tissue (such as skin) and leave them unharmed until they reach their target.