title: A simple radiation balance for measuring ultrasonic power.
abstract: The design and construction of a beam balance for measuring the power outputs of therapeutic and diagnostic ultrasonic instruments is described. Power outputs down to 4 mW have been measured using a low magnification microscope.
mesh_terms: D002138:Calibration; D008722:Methods; D011827:Radiation; D014465:Ultrasonics / Q000295:instrumentation