Device for eliminating fixed echoes for an ultrasonic echograph

Details Device for eliminating fixed echoes for an ultrasonic echograph Device for eliminating fixed echoes for an ultrasonic echograph

1991-05-15

1992-10-20

Jaworski, Francis

Surgery

Truss

Pad

7386125, A61B 806

Patent

active

051561530

ABSTRACT:
An ultrasonic system includes a recurrent pulse emitter including an intercorrelation circuit for determining blood flow profiles. Three filters in parallel eliminate fixed echoes with passband and delay lines, the passbands of which filters are juxtaposed. Amplitude detectors connected to the input of a comparator detect the filter output signals amplitude and delay elements are connected between the output of each filter and a multiplexor, the latter receiving a control signal (CO) issued by the comparator to select at its output that one among the output signals of the filters which presents the highest amplitude.

REFERENCES:
patent: 4803990 (1989-02-01), Bonnefous et al.
patent: 4883060 (1989-11-01), Pesque et al.
patent: 4888694 (1989-12-01), Chesarek
patent: 5062430 (1991-11-01), Bonnefous

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