Ultrasonic color doppler velocity and direction imaging

Details Ultrasonic color doppler velocity and direction imaging Ultrasonic color doppler velocity and direction imaging

1998-05-12

1999-06-08

Kamm, William E.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

600437, 600454, A61B 0800

Patent

active

059101199

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.

REFERENCES:
patent: 5375600 (1994-12-01), Melton, Jr. et al.
patent: 5409010 (1995-04-01), Beach et al.

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