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[ adjective ] having frequencies above those of audible sound
Synonyms Used in print (Walter H. Buchsbaum, "Advances in Medical Electronics"...)Recently many doctors have installed ultrasonic vibration machines for deep massage of bruises , contusions , and simple bursitis . Sonar can be used to measure the thickness of the heart by placing small crystal transducers at opposite sides of the heart or blood_vessel and exciting one with some pulsed ultrasonic energy . The Doppler_effect , using ultrasonic signals , can be employed to measure the flow of blood without cutting into the blood_vessel . It uses both an ultrasonic dimensioning arrangement of the heart and a catheter carrying a thermistor inserted into the bloodstream . This pressure measurement may be made at_the_same_time that the ultrasonic dimensioning measurement is made . Related terms |
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