Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1996-08-21
1998-08-25
Jaworski, Francis
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
73631, A61B 800
Patent
active
057978441
ABSTRACT:
An ultrasonic image processing for accurately detecting the annulus portion from the ultrasonic image of the long axis view of a heart. A heart wall contour is extracted from the ultrasonic image, and a center of gravity of the heart wall contour is determined. Then, for an image imaged from an apex portion side, the annulus portion is detected from points on the heart wall contour located at positions deeper than the center of gravity, whereas for an image imaged by a transesophageal echocardlography, the annulus portion is detected from points on the heart wall contour located at positions shallower than the center of gravity. An ultrasonic image can be obtained in high precision by correcting the sensitivity in a direction perpendicular to the ultrasonic beam, either by adjusting a reception gain or correcting an image intensity at specific positions within a scanning space, according to an angle formed by an ultrasonic beam vector passing through each specific position and a prescribed vector defined at each specific position.
REFERENCES:
patent: 5014711 (1991-05-01), Nagasaki
patent: 5540228 (1996-07-01), Li
patent: 5579768 (1996-12-01), Klesenski
Iinuma Kazuhiro
Yoshioka Hideki
Jaworski Francis
Kabushiki Kaisha Toshiba
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