Surgery – Truss – Pad
Patent
1989-05-19
1991-04-30
Jaworski, Francis
Surgery
Truss
Pad
73625, 73599, 12866006, A61B 800
Patent
active
050108859
ABSTRACT:
On emission and/or on reception, circuits impose on the signals emitted and/or received, delays in accordance with a random or pseudo-random delay law. On emission, just as on reception, this delay law is superposed on that for focusing and angulation of the signals. On emission, the law is obtained, for example, by causing variation of the instants of triggering of the generators of signals for the excitation of the transducers. On reception, either parallel random delay lines or conditional inversion circuits are included. These circuits permit the breakdown of the coherence of the ultrasonic waves on emission, on reception, or on both simultaneously, may be used in an analogue version, as well as in a digital version.
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Cancre Fabrice
Fink Mathias
Pesque Patrick
Jaworski Francis
Squire William
U.S. Philips Corporation
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