Crossed linear arrays for ultrasonic medical imaging

Details Crossed linear arrays for ultrasonic medical imaging Crossed linear arrays for ultrasonic medical imaging

1988-12-27

1989-10-03

Chapman, John

Measuring and testing

Vibration

By mechanical waves

12866205, 310334, G01N 2900

Patent

active

048708674

ABSTRACT:
An improved piezoelectric transducer permitting linear scanning along two intersecting planes. The transducer is fabricated from a cross shaped piezoelectric plate covered on both faces with metallic electrodes. First and second linear arrays are formed by the partial dicing of the opposite faces of the electrodes and plate. The two segments of the orthogonal arrays are integrated in the crossed area. An aperture may be disposed in the central area so as to permit a surgical implement, such as a biopsy needle, to be inserted into the tissue under ultrasonic visualization. Scanning electronics are alternately connectable to each of the arrays by means of a multiple pole switch under the control of a clock.

REFERENCES:
patent: 3881164 (1975-04-01), Kossoff
patent: 4570488 (1986-02-01), Miwa et al.
patent: 4580451 (1986-04-01), Miwa et al.
patent: 4640291 (1987-02-01), t Hoen
patent: 4671293 (1987-06-01), Shaulov
"Hybrid Linear and Matrix Acoustic Arrays", by M. Pappalardo, Ultrasonics, Mar. 1981 (310/334).

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