Focusing piezoelectric ultrasonic medical diagnostic system

Details Focusing piezoelectric ultrasonic medical diagnostic system Focusing piezoelectric ultrasonic medical diagnostic system

1979-10-02

1981-06-30

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310334, 310335, 310371, 128660, H01L 4108

Patent

active

042764912

ABSTRACT:
There is disclosed an ultrasonic piezoelectric transducer consisting of two separate transducer elements bonded together. The individual elements may be similar or different in size, thickness, and/or material. The material which bonds the two elements together may serve as one electrode, and two other electrodes coat the outer surfaces of the two individual elements. By switching the electrodes which are connected to the transmit and receive circuits of an ultrasonic medical scanning apparatus, the single transducer may be used for imaging with high resolution at one frequency, and for pulse Doppler velocity measurements at a different frequency. The two elements may be driven individually or in combination, in order to achieve different operating frequencies and focusings.

REFERENCES:
patent: 2645727 (1953-07-01), Willard
patent: 3292018 (1966-12-01), Clynes
patent: 3355603 (1967-11-01), Hesse et al.
patent: 4096756 (1978-06-01), Alphonse
patent: 4181864 (1980-01-01), Etzold

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