Ultrasonic Power Levels Used In Commercial Equipment For Medical Applications, And How To Control It For Patient's Safety

Janis G. Ziedonis

doi:10.1117/12.954035

1 February 1975 Ultrasonic Power Levels Used In Commercial Equipment For Medical Applications, And How To Control It For Patient's Safety

Janis G. Ziedonis

Author Affiliations +

Proceedings Volume 0047, Application of Optical Instrumentation in Medicine III; (1975) https://doi.org/10.1117/12.954035
Event: Application of Optical Instrumentation in Medicine III, 1974, Kansas City, United States

Abstract

Today's use of ultrasound could be divided in two major areas: the therapeutic and the diagnostic. The major difference between the two applications is the ultrasonic power level at which the equipment operates. In therapeutic applications the systems operate at ultrasonic power levels of up to several watts per square centimeters while the diagnostic equipment operates at power levels of well below 100 milliwatts per square centimeters. The therapeutic equipment is designed to agitate the tissue to the level where thermal heating occurs in the tissue and experimentally has been found to be quite successful in its effects for the treatment of muscular ailments such as lumbago. For diagnostic purposes on the other hand as long as sufficient amount of signal has returned for electronic processing, no additional energy is necessary. Therefore considerably lower ultrasonic power levels are being used.

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Janis G. Ziedonis "Ultrasonic Power Levels Used In Commercial Equipment For Medical Applications, And How To Control It For Patient's Safety", Proc. SPIE 0047, Application of Optical Instrumentation in Medicine III, (1 February 1975); https://doi.org/10.1117/12.954035

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