Before the beginning of the 19th century, Spallanzani recognized the existence of sound that is inaudible to human ears, after noting that bats did not fly into unseen obstacles unless their hearing was impaired. The physiologic potential of ultrasound was probably first recognized by Langevin in 1917, when he saw small fish killed by sonic waves. Medically speaking, ultrasound was given its greatest impetus in 1944 when Horvath reported successful ultrasonic treatment of sarcomatous disease and other types of superficial malignant growths . Use of ultrasound grew rapidly in Germany, but it was not widely accepted in the United States until 1952, following the first report of the Council on Physical Medicine and Rehabilitation.
KeywordsUltrasonic Energy Tinea Capitis Sheer Wave Lithium Sulfate Treatment Head
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