Surgery – Truss – Perineal
Patent
1977-04-06
1978-09-12
Cohen, Lee S.
Surgery
Truss
Perineal
73597, 73614, A61B 1000
Patent
active
041129270
ABSTRACT:
A pulsed ultrasonic detection system particularly adapted for detection of biological tissue includes a probe for placement against the body, apparatus for transmitting ultrasonic energy into the body and for receiving return pulses, signal processing circuits and a cathode ray tube display for displaying the return pulses as a function of time. A gating signal is generated after a predetermined time delay from each transmitted pulse, and the time delay and the duration of the gating signal are selected to correspond to the timing of a particular expected return pulse. Return pulses are gated into an audible signal device by a switching device, but only during the time interval thus defined by the gating signal. If a return pulse of sufficient amplitude occurs during the gated interval, the audible signal device is energized.
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patent: 3041872 (1962-07-01), Brown et al.
patent: 3053080 (1962-09-01), Colten et al.
patent: 3555889 (1971-01-01), Weighart
patent: 3565057 (1971-02-01), Hart
patent: 3828768 (1974-08-01), Douglas
patent: 3872858 (1975-03-01), Hudson et al.
patent: 3888238 (1975-06-01), Meindl et al.
patent: 3921622 (1975-11-01), Cole
patent: 3972228 (1976-08-01), Mansson
Cohen Lee S.
Renco Corporation
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