Ultrasonic blood velocity detector

Details Ultrasonic blood velocity detector Ultrasonic blood velocity detector

1989-06-12

1991-07-16

Jaworski, Francis

Surgery

Truss

Pad

7386125, A61B 800

Patent

active

050316281

ABSTRACT:
An ultrasonic blood velocity detector comprises an ultrasonic probe emitting ultrasonic wave into an examined body and converting echoes of the emitted ultrasonic wave into an echo signal. The echo signal is processed into a detection signal through phase detection. A first Doppler signal and a second Doppler signal are derived from the detection signal. The first Doppler signal represents a flow of blood. The second Doppler signal mainly contains clutter components. A difference in phase between the first and second Doppler signals is calculated.

REFERENCES:
patent: 4554926 (1985-11-01), Shirasaka
patent: 4896674 (1990-01-01), Seo
Fehr, R. et al., "A New MTI Structure with Inherent Analog -to-Digital Conversion", Conf. Ckt Theory and Design, Lausanne, Switzerland (4-8 Sep. 1978).

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