Dual transducer arrangement for ultrasonic imaging system

Details Dual transducer arrangement for ultrasonic imaging system Dual transducer arrangement for ultrasonic imaging system

1976-09-20

1978-06-27

Farley, Richard A.

Communications: electrical

Selective

73626, 73628, 73641, 73642, 310335, 310369, 340 3D, 340 8L, 128 205F, 128 205Z, G01S 966

Patent

active

040978354

ABSTRACT:
Combination Doppler and B-scan ultrasonic imaging apparatus is disclosed which includes visual display means for the simultaneous visual display of received ultrasonic Doppler and B-scan information. The apparatus includes first and second focused transducers associated with the Doppler and B-scan systems, which transducers are individually mounted for movement along parallel linear paths. The transducers each comprise a generally semi-cylindrical shaped body of piezoelectric material having opposite end faces upon which electrodes are disposed for connection to Doppler and B-scan transmitter and/or receiver units. The flat side walls of the piezoelectric bodies are positioned closely adjacent a mid-plane extending between the transducers, and means are provided for focusing the transducers at substantially the same depth for operation along a common focal region at, or adjacent, the mid-plane. One such focusing means includes acoustic lenses carried by the piezoelectric bodies. Another focusing means includes an electrode array for connection to the transmitter and/or receiver units through signal delay means. In yet another embodiment, the piezoelectric bodies are formed with curved end faces for focusing.

REFERENCES:
patent: 2549872 (1951-04-01), Willard
patent: 3090030 (1963-05-01), Schuck
patent: 3233450 (1966-02-01), Fry
patent: 3430625 (1969-03-01), McLeod, Jr.

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