Diffracting doppler-transducer

Details Diffracting doppler-transducer Diffracting doppler-transducer

1994-04-15

1996-02-06

Jaworski, Francis

Surgery

Truss

Pad

12866203, 310334, A61B 806, H01L 4104

Patent

active

054889537

ABSTRACT:
An ultrasonic transducer apparatus of variable frequency including a diffracting structure adapted for emitting and receiving a plurality of diffracted ultrasonic beams of calculable different angles for determining the velocity of a fluid flowing through a lumen, and flow volume. Velocity and flow volume are determined from at least two equations in the two unknowns of the velocity, and the angle between the ultrasonic transducer apparatus and the direction of the fluid flow, and from a determination of the diameter of the lumen.

REFERENCES:
patent: 4075516 (1978-02-01), Hattori et al.
patent: 4142412 (1979-03-01), McLeod et al.
patent: 4375767 (1983-03-01), Magori
patent: 5295487 (1994-03-01), Saitoh et al.
patent: 5305758 (1994-04-01), Dietz et al.

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