Doppler

Doppler is a term used in medicine and physics to describe the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who proposed it in 1842 in Prague.

Doppler Effect

The Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842, is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. It is commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from an observer.

Doppler in Medicine

In medicine, the Doppler effect is used in ultrasound technology, such as Doppler echocardiography and Doppler sonography. These techniques use the Doppler effect to assess the flow of blood in the body. It is particularly useful in cardiovascular studies, allowing doctors to detect blockages in the blood vessels.

Doppler Echocardiography

Doppler echocardiography is a procedure that uses ultrasound technology to examine the heart. It uses the Doppler effect to produce images of the heart and to measure the speed and direction of blood flow within the heart.

Doppler Sonography

Doppler sonography is a medical imaging technique used to visualize the body's blood flow, in real-time, using the Doppler effect of ultrasound waves. It is used in many areas of medicine, including obstetrics, cardiology, and vascular surgery.

See Also

• Ultrasound
• Echocardiography
• Sonography
• Cardiovascular system
• Vascular surgery

References

Doppler Resources
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