Quantitative volume blood flow measurement by an ultrasound imaging system featuring a Doppler modality
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United States of America Patent
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Mar 24, 1981
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N/A
app pub date -
Aug 24, 1979
filing date -
Aug 24, 1979
priority date (Note) -
Expired
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Abstract
A technique particularly suitable for measuring volume flow rate in the ascending aorta employs real time sector-scan imaging to locate the cross section of interest and align the Doppler beam with the vessel axis. The number of active transmit and receive array transducer elements is varied to electronically tailor the acoustic beam cross section at the required range to be approximately equal to the vessel cross section, which is the sample volume. Mean flow velocity is computed by averaging the spectral components extracted from the sample volume by a Fourier transform processor. Volume flow rate is calculated by multiplying mean flow velocity and estimated area.
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