Directional detection of blood velocities in an ultrasound syste

Details Directional detection of blood velocities in an ultrasound syste Directional detection of blood velocities in an ultrasound syste

1978-08-23

1980-08-19

Michell, Robert W.

Surgery

Truss

Pad

7386125, 73602, A61B 502

Patent

active

042179092

ABSTRACT:
The velocity and direction of the flow of blood and similar liquids, toward or away from the transducer, are measured by coherent demodulation of the received echoes in two quadrature components and subsequent real time processing by a complex Fourier transform processor. A distribution of Doppler frequency shifts and bidirectional velocities are detected and displayed. The preferred embodiment is a duplex imaging system with a sector scanner into which a Doppler modality is incorporated with little added complexity.

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Vogel, S. et al., "The Use of the Doppler Ultrasonic Flowmeter in the Transcutaneous and Intraoperative Measurement of Coronary Artery Blood Flow," Conf: Proc. of the 2d Europ. Cong. on UTS in Med., Munich, Ger. May 12-16, 1975, pp. 169-173.
Baker, D. W., "Pulsed Uts Doppler Blood Flow Sensing," IEEE Trans. SIUS, vol. 17, #3, Jul. 1970, pp. 170-185.
Peronneau, P. et al., "Doppler Ultrasound Pulsed Blood Flowmeter" Onde Electr., vol. 50, fasc. 5, pp. 369-384, May 1970.

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