Ultrasonic color doppler velocity and direction imaging
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United States of America Patent
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Jun 8, 1999
Grant Date -
N/A
app pub date -
May 12, 1998
filing date -
May 12, 1998
priority date (Note) -
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Abstract
A system is disclosed for performing ultrasonic color Doppler imaging to produce absolute velocity and flow direction information for complex media. Ultrasonic color Doppler beams are steered at two different angles and samples are taken at the points of intersection between the steered beams. The duplex color Doppler sample volumes are two overlapping sample volumes interrogated from different angles. Frequency-shift information provided by the color Doppler sample volumes are used to compute the absolute mean velocity and direction of motion of acoustic reflectors within the sample volumes. Velocity and direction data are computed for a two-dimensional array of duplex color Doppler sample volumes and mapped into a color scale to provide a spatial distribution of the velocity or direction of flow or motion of acoustic reflectors.
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