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• W2108565515 abstract "Backscattering of an incident ultrasound beam by blood gives rise to a Doppler spectrum whose characteristics are affected not only by the velocity distribution, but also by certain basic aspects of the RBC's behavior. Starting from fundamental assumptions, an explicit expression is derived for the Doppler spectrum in terms of the variance in the scatterer number density and the backscattering cross section. This shows that the Doppler power at a given frequency is weighted by the backscattering cross section and the manner in which the red blood cells (RBC's) are packed (packing factor). Since spatial variations in the flow field can result in changes in the variance and backscattering cross section, the mean Doppler frequency will not necessarily be proportional to the mean flow through the sample volume. Experimental results for two different flow fields are used to illustrate these effects. The implications of these findings are discussed in relation to volumetric flow estimation and the power mode display used in some color Doppler flow imaging systems." @default.
• W2108565515 created "2016-06-24" @default.
• W2108565515 creator A5036195583 @default.
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• W2108565515 date "1996-06-01" @default.
• W2108565515 modified "2023-10-16" @default.
• W2108565515 title "Origin of the Doppler ultrasound spectrum from blood" @default.
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• W2108565515 doi "https://doi.org/10.1109/10.495290" @default.
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