Apparatus, system and method for measuring spatial average veloc

Details Apparatus, system and method for measuring spatial average veloc Apparatus, system and method for measuring spatial average veloc

1989-01-13

1990-11-06

Jaworski, Francis

Surgery

Truss

Pad

128772, A61B 812

Patent

active

049677535

ABSTRACT:
System for measuring a characteristic of flow of liquid in a vessel of a patient comprising a transducer positioned in a vessel in a patient for supplying ultrasonic energy. The transducer produces a substantially uniform beam which encompasses the vessel. The transducer receives ultrasonic energy back scattered from the red blood cells and provides an electrical output signal. A first moment detector is provided which receives the electrical output from the transducer and provides a first moment signal. Normalization is provided to the output of the first moment detector to provide an electrical output representing a characteristic of the flow of the liquid in the vessel.

REFERENCES:
patent: 4466444 (1984-08-01), Baba
patent: 4721117 (1988-01-01), Maretal
patent: 4748986 (1988-06-01), Morrison et al.
patent: 4815478 (1989-03-01), Buchbinder et al.

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