Doppler

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Dopp·ler

(dop'lĕr),
Johann Christian, Austrian mathematician and physicist, 1803-1853. See: Doppler echocardiography, Doppler effect, Doppler phenomenon, Doppler shift, Doppler ultrasonography.

Dop·pler

(dop'lĕr),
A diagnostic instrument that emits an ultrasonic beam into the body; the ultrasound reflected from moving structures changes its frequency (Doppler effect). Of diagnostic value in peripheral vascular and cardiac disease.
Farlex Partner Medical Dictionary © Farlex 2012

Dop·pler

(dop'lĕr)
A diagnostic instrument that emits an ultrasonic beam into the body; the ultrasound reflected from moving structures changes its frequency (Doppler effect). Of diagnostic value in peripheral vascular and cardiac disease.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Doppler

The Doppler effect refers to the apparent change in frequency of sound wave echoes returning to a stationary source from a moving target. If the object is moving toward the source, the frequency increases; if the object is moving away, the frequency decreases. The size of this frequency shift can be used to compute the object's speed—be it a car on the road or blood in an artery. The Doppler effect holds true for all types of radiation, not just sound.
Mentioned in: Abdominal Ultrasound
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.