Switchable depth of focus pulse-echo ultrasonic-imaging display

Details Switchable depth of focus pulse-echo ultrasonic-imaging display Switchable depth of focus pulse-echo ultrasonic-imaging display

1977-10-20

1979-02-13

Swisher, S. Clement

Measuring and testing

Vibration

By mechanical waves

73641, 73642, G01N 924

Patent

active

041388950

ABSTRACT:
An ultrasonic transducing unit comprising a central section, which cooperates with only a small portion of the relatively large aperture of an acoustic lens, and an annular section, which cooperates with the remainder of the aperture, can be selectively operated by switch means to utilize the relatively large depth of focus detected signal of the central section alone or to utilize the relatively small depth of focus detected signal of both the central and annular sections together.

REFERENCES:
patent: 3937066 (1976-02-01), Green et al.
patent: 4012952 (1977-03-01), Dory
patent: 4016750 (1977-04-01), Green

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