Measurement of volumetric fluid flow and its velocity profile
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United States of America Patent
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Feb 3, 2004
Grant Date -
Jan 31, 2002
app pub date -
Dec 26, 2000
filing date -
Nov 1, 1996
priority date (Note) -
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Abstract
A method to measure spatial fluid flow components and their velocity profiles in a number of locations in a cross-sectional area of a lumen or other body cavity by using ultrasound in which the cross-sectional area is interrogated by a plurality of ultrasonic beams; the estimation of the spatial flow components is obtained from a combination of estimations of axial, lateral and total flow; the estimation of one or more flow components is obtained through any combination of time-shift and decorrelation analysis of two or more beam-signals of the interrogating ultrasound transducer; and the estimation accuracy is further improved by the use of a reference decorrelation curve obtained from experiments or beam-theory or both.
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