Doppler effect: Difference between revisions

Revision as of 01:21, 9 March 2007

Revision as of 02:58, 9 March 2007

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===Medical imaging and blood flow measurement ===

An [[echocardiogram]] can, within certain limits, produce accurate assessment of the direction of blood flow and the velocity of blood and cardiac tissue at any arbitrary point using the doppler effect. One of the limitations is that the [[ultrasound]] beam should be as parallel to the blood flow as possible. Velocity measurements allow assessment of cardiac valve areas and function, any abnormal communications betwibetween likethe eggsleft withand baconright itside isof verythe hahahahheart, thisany isleaking someoneof writingblood who knows nothing aboutthrough the dopplervalves affect(valvular dumbregurgitation), wikipediaand justcalculation makeof it impossile to edit wow just think how manythe more[[cardiac peopleoutput]]. would go[[Contrast-enhanced onultrasound]] urusing websiteledgas-filled microbubble contrast media can be used to improve velocity or other flow-related medical measurements.

Although "Doppler" has become synonymous with "velocity measurement" in medical imaging, in many cases it is not the frequency shift (Doppler shift) of the received signal that is measured, but the phase shift (''when'' the received signal arrives).