Doppler
Doppler
Doppler (pronounced: /ˈdɒplər/) is a term used in the field of medicine and physics to refer to the Doppler effect, a phenomenon observed in wave propagation. It is named after the Austrian physicist Christian Doppler, who first proposed the concept in the 19th century.
Etymology
The term "Doppler" is derived from the surname of Christian Doppler, who first described the effect in 1842. The word "effect" is from the Latin "effectus", meaning "accomplishment" or "performance".
Definition
In medicine, the Doppler effect is used in Doppler ultrasound and Doppler echocardiography to measure the velocity of blood flow and to detect any abnormalities. The Doppler effect refers to the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.
Related Terms
- Doppler ultrasound: A non-invasive test that can be used to estimate the blood flow through your blood vessels by bouncing high-frequency sound waves (ultrasound) off circulating red blood cells.
- Doppler echocardiography: A procedure that uses ultrasound technology to examine the heart and blood vessels.
- Doppler effect: The increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other.
- Doppler shift: A change in frequency due to the Doppler effect.
- Doppler radar: A specialized radar that uses the Doppler effect to produce velocity data about objects at a distance.
See Also
External links
- Medical encyclopedia article on Doppler
- Wikipedia's article - Doppler
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