Ultrasonic probe, ultrasonic probe device. process for producing

Details Ultrasonic probe, ultrasonic probe device. process for producing Ultrasonic probe, ultrasonic probe device. process for producing

1996-04-08

1999-03-23

Manuel, George

Surgery

Truss

Pad

12866203, A61B 800

Patent

active

058846271

ABSTRACT:
An ultrasonic probe comprising a coaxial cable 11 capable of transferring an energizing pulse voltage and an echo signal, at least one piezoelectric element 5, an acoustic matching layer 7 disposed on a sound transmitting face side of each piezoelectric element 5 and an acoustic backing layer 8 disposed on its opposite side, the above ultrasonic probe being adapted to transmit and receive an ultrasonic wave, wherein each piezoelectric element 5 has the following distribution of spontaneous polarization according to positions of the piezoelectric element. The spontaneous polarization of the ultrasonic probe of the present invention has differences such that the spontaneous polarization is caused to be strong at a position where the absolute value of Bessel function J.sub.0 (x/a) is large while the spontaneous polarization is weak at a position where the absolute value of J.sub.0 (x/a) is small.

REFERENCES:
patent: 4431936 (1984-02-01), Fu et al.
patent: 5081995 (1992-01-01), Lu et al.
patent: 5415175 (1995-05-01), Hanasy

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