Method and apparatus for characterizing reflected ultrasonic pul

Details Method and apparatus for characterizing reflected ultrasonic pul Method and apparatus for characterizing reflected ultrasonic pul

1989-10-17

1991-07-16

Jaworski, Francis

Surgery

Truss

Pad

73631, A61B 800

Patent

active

050316273

ABSTRACT:
The invention is a method of and apparatus for characterizing the amplitudes of a sequence of reflected pulses R.sub.1, R.sub.2, and R.sub.3 by converting them into corresponding electrical signals E.sub.1, E.sub.2, and E.sub.3 and thereafter exponentially adjusting the amplitudes of the respective signals E.sub.1, E.sub.2, and E.sub.3 to substantially the same value during each sequence thereby restoring the reflected pulses R.sub.1, R.sub.2, and R.sub.3 to their initial reflection values by means of timing means 12 and 13, an exponential generator 17 and a time gain compensator 18. Envelope and baseline reject circuits 23 and 24 respectively permit the display and accurate location of the time spaced sequence of electric signals having substantially the same amplitude on a measurement scale on a suitable video display or oscilloscope 14.

REFERENCES:
patent: 4043181 (1977-08-01), Nigam
patent: 4080960 (1978-03-01), Goans et al.
patent: 4852576 (1989-08-01), Inbar et al.

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