Gel is used on all surfaces of the head to reduce friction and assist transmission of the ultrasonic waves.Therapeutic ultrasound in physical therapy is alternating compression and rarefaction of sound waves with a frequency of 0.7 to 3.3 MHz. Maximum energy absorption in soft tissue occurs from 2 to 5 cm.
Ultrasound therapy is a treatment modality used by physical therapists or occupational therapists to treat pain conditions and to promote tissue healing.
Ultrasound is often used to provide deep heating to soft tissue structures in the body. Deep heating tendons, muscles or ligaments increases circulation to those tissues, which is thought to help the healing process. Increasing tissue temperature with ultrasound is also used to help decrease pain.