What is the therapeutic application of high-frequency sound waves that penetrate through tissue called?

The therapeutic application of high-frequency sound waves that penetrate through tissue is known as ultrasound. This technique utilizes sound waves that are above the range of human hearing to create images of the internal structures of the body or to produce therapeutic effects.

In physical therapy, ultrasound is commonly used to promote tissue healing, increase blood flow, and alleviate pain. The sound waves can generate heat within the tissues, which can help relax muscles and improve circulation, thereby facilitating the healing process. This method is particularly effective for conditions such as muscle strains, tendonitis, and joint pain, as it can enhance tissue repair at a cellular level.

Other options like magnetic resonance imaging involve the use of strong magnets and radio waves to create detailed images of organs and tissues but do not have therapeutic applications through sound waves. Shockwave therapy uses sound waves as well, but it is typically focused on breaking down calcifications or scar tissue, rather than providing the broad therapeutic benefits that ultrasound offers. Infrared therapy uses different forms of energy to produce heat and improve circulation but relies on light rather than sound waves. Each method has its own specific applications, but in the context of therapeutic sound waves, ultrasound stands out as the preferred choice.