Ultrasound examination apparatus comprising a mosaic of...

Details Ultrasound examination apparatus comprising a mosaic of... Ultrasound examination apparatus comprising a mosaic of...

G - Physics

01

N

349/35

G01N 29/00 (2006.01) G10K 11/34 (2006.01) H04R 17/08 (2006.01)

Patent

CA 1157140

ABSTRACT An ultrasound examination apparatus comprises a processing circuit for echo signals from a mosaic of ultrasonic transducers which are made of an electrostrictive material with a non-remanent polarization. These signals are applied to processing channels which comprise coupling means for coupling the electrodes of the transducers to a circuit for generating a polarization voltage ramp whose waveform is the inverse of that of the attentuation curve of the ultrasonic signals in the structures examined. These coupling means, for example, an RC circuit or a transformer enable the polarization voltage to be applied to the electrodes while inhibiting the transmission to the part of the processing channels which is situated behind the coupling means.

373285

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