Ultrasonic pulse-echo apparatus

Details Ultrasonic pulse-echo apparatus Ultrasonic pulse-echo apparatus

A - Human Necessities

61

B

349/36

A61B 10/00 (2006.01) G01S 7/52 (2006.01) G01S 15/89 (2006.01)

Patent

CA 1128643

Abstract of the Disclosure For use in an ultrasonic pulse-echo apparatus including an ultrasonic wave transducer for transmitting an ultrasonic wave into an object to be examined and for producing a first image signal corresponding to echo pulses reflected from the interior of the object, an improved signal processing means for compensating for brightness variations of effects caused by varying the object and for providing a second image signal corresponding to the first image signal, and an X- Y type display device for displaying the image of the object from the second image signal. Compensation for the brightness varying effect is secured by a gain controlled amplifier of which the gain is controlled by a control signal corresponding to the cumulative second image signal of the preceding frame.

328799

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