Pulsed doppler flow mapping apparatus

Details Pulsed doppler flow mapping apparatus Pulsed doppler flow mapping apparatus

1985-08-14

1987-06-09

Howell, Kyle L.

Surgery

Truss

Pad

7386125, A61B 1000

Patent

active

046712941

ABSTRACT:
A pulsed Doppler imaging system is shown in which velocity of a fluid is attained by multiplying the quadrature samples of the reflections of one burst with the conjugate of the quadrature samples of the reflections of a previous burst for a number of pairs of equally spaced bursts, deriving the angle represented by the real and imaginary components of each multiplication and averaging the angles to attain an angle that is used in determining the velocity of the fluid in the sample volume from which the reflections are sampled.

REFERENCES:
patent: 4542657 (1985-09-01), Barber et al.
Brandestini, et al., "Blood Flow Imaging Using a Discrete-Time Frequency Meter", 1978 Ultrasonics Symposium Proceedings, pp. 348-352.

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