Ultrasonic imaging system

Details Ultrasonic imaging system Ultrasonic imaging system

G - Physics

01

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349/35

G01S 15/00 (2006.01) A61B 8/08 (2006.01) G01N 29/00 (2006.01) G01N 29/06 (2006.01) G01N 29/26 (2006.01) G01S 15/89 (2006.01) G10K 11/34 (2006.01)

Patent

CA 1074898

PATENT APPLICATION of LOUIS T. ZITELLI and WILLIAM L. BEAVER for ULTRASONIC IMAGING SYSTEM ABSTRACT An electrical-to-acoustic wave transducer contains an array of piezoelectric elements connected to wave delay circuits to generate a directed acoustic beam and to receive a similarly directed, reflected beam. The distance of a reflecting object is sensed by the time delay of the reflected wave. The apparatus is adapted to sense reflections from both the Fresnel region and the far-field of the array. During the time when reflections from nearby objects in the Fresnel region are received, the effective aperture of the array is reduced by disconnecting elements near its extremities or reducing their gain, producing a narrower beam for improved angular resolution. - 1 -

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