Image processing method and system for radiological diagnostics

Details Image processing method and system for radiological diagnostics Image processing method and system for radiological diagnostics

1989-10-23

1991-10-15

Cohen, Lee S.

Surgery

Truss

Pad

378 99, 358111, 36441323, 128653R, A61B 600

Patent

active

050565249

ABSTRACT:
A digital mask image is obtained by emitting radiation onto a subject before a contrast medium is injected in a blood vessel, and digital mask image data corresponding to the mask image is stored in a first image memory. A digital contrast image is obtained by emitting radiation to the subject after the contrast medium is injected in the blood vessel, and contrast image data corresponding to the contrast image is stored in a second image memory. The mask image data is read out from the first image memory and the contrast image data is read out from the second image memory. Then, the mask image data is subtracted from the contrast image data by a subtraction circuit, thus obtaining angiographical image data. Edges of the blood vessel are detected from the angiographical image data by an edge detecting circuit. Edge image data corresponding to the detected edges is added to the fluoroscopic image data by a summing circuit, thus obtaining a road map image including a contour of the blood vessel and the fluoroscopic image. The road map image is displayed on a TV monitor.

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Couturier, "Sobel Edge Extraction Circuit", Air Force Wright Aeronautical Laboratories (1981).

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