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| Therapeutic ultrasound ： ウィキペディア英語版 |
Therapeutic ultrasound
Therapeutic ultrasound refers generally to any type of ultrasonic procedure that uses ultrasound for therapeutic benefit. This includes HIFU, lithotripsy, targeted ultrasound drug delivery, trans-dermal ultrasound drug delivery, ultrasound hemostasis, cancer therapy, and ultrasound assisted thrombolysis
〔(Therapeutic Ultrasound: A Promising Future in Clinical Medicine )〕 It may use focused ultrasound (FUS) or unfocused ultrasound.
Ultrasound is a method of stimulating the tissue beneath the skin's surface using very high frequency sound waves, between 800,000 Hz and 2,000,000 Hz, which cannot be heard by humans.
==History==
The first large scale application of ultrasound was around World War II. Sonar systems were being built and used to navigate submarines. It was realized that the high intensity ultrasound waves that they were using were heating and killing fish. This led to research in tissue heating and healing effects. Since the 1940s, ultrasound has been used by physical and occupational therapists for therapeutic effects.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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