High resolution pulse echo ultrasonic display system

Details High resolution pulse echo ultrasonic display system High resolution pulse echo ultrasonic display system

G - Physics

01

N

349/36

G01N 29/00 (2006.01) A61B 8/00 (2006.01) A61B 10/00 (2006.01) G01N 29/06 (2006.01) G01S 15/89 (2006.01) G10K 11/30 (2006.01)

Patent

CA 1074902

Abstract of the Disclosure An improvement to a pulse-echo ultrasonic-imaging system employing an acoustic focusing device occupying a fixed aperture to both illuminate internal structure of a visually opaque object with a scanning focused beam of ultrasonic energy and for returning a reflected signal portion of the scanning focused beam passed therethrough for detection. The improvement makes it possible to employ a large numerical aperture spherical lens exhibiting aberration as the focusing device by utilizing a corrector plate. The corrector plate causes the lens to image a flat transducer in a flat image field. Were it not for the corrector plate, the lens aberration would provide an un- desired curved image field. The improved system is suitable for displaying deep soft tissue of a living human being for a medical diagnostic purpose.

282033

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