Ultrasonic diagnosis apparatus

Details Ultrasonic diagnosis apparatus Ultrasonic diagnosis apparatus

1986-02-06

1989-05-16

Jaworski, Francis

Surgery

Truss

Pad

12866005, A61B 1000

Patent

active

048300160

ABSTRACT:
An ultrasonic diagnosis apparatus comprises a probe means for transmitting an ultrasonic pulse beam toward an internal moving part of a living body and receiving the reflected wave therefrom, and a plurality of phasing circuits for simultaneously receiving and phasing the received signal in parallel in a plurality of channels. The received signals of plural channels are mixed with a set of complex reference signals having a complex relation therebetween, thereby converting the received signals into complex signals. A multiple-channel multiple-cancel complex signal canceller with feedback removes reflected signal components from a low-speed moving part and/or a stationary part of the living body. Speed and speed dispersion operating circuits compute the moving speed of the moving part on the basis of the complex signals and the dispersion thereof, respectively. The results of computation are subjected to image processing.

REFERENCES:
patent: 4254662 (1981-03-01), Kuroda et al.
patent: 4417584 (1983-11-01), Cathignol et al.
patent: 4622977 (1986-11-01), Namekaa et al.
patent: 4660565 (1987-04-01), Shirasak

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