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Optical Engineering

Technique For Automatic Motion Correction In Digital Subtraction Angiography
Author(s): J. Michael Fitzpatrick; David R. Pickens, III; John J. Grefenstette; Ronald R. Price; A. Everette James, Jr.
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Paper Abstract

The motion of the contracting heart has made it impossible to study coronary arteries after venous injection of a contrast medium using digital subtraction angiography (DSA), even with cardiac gating. The motion of the heart, as well as that of surrounding bone and tissue, produces artifacts in the difference image that often overlie the contrast-enhanced vessel images. Because the vessels are small and the contrast medium inherent in a venous injection is dilute, the intensity of a vessel image is weak. The motion artifacts typically are strong enough to obscure the vessel images, rendering the images diagnostically useless. A technique for removing motion artifacts is presented that permits removal of motion between a pair of images acquired during mask-mode DSA by geometrically transforming one image so that it is regis-tered with the other. The transformations can handle three-dimensional motion. Genetic optimization algorithms are employed to determine the optimum transformation. A series of phantom images are used to demonstrate the ability of the technique to remove three-dimensional motion.

Paper Details

Date Published: 1 November 1987
PDF: 9 pages
Opt. Eng. 26(11) 261085 doi: 10.1117/12.7974200
Published in: Optical Engineering Volume 26, Issue 11
Show Author Affiliations
J. Michael Fitzpatrick, Vanderbilt University (United States)
David R. Pickens, III, Vanderbilt University Medical Center (United States)
John J. Grefenstette, Vanderbilt University (United States)
Ronald R. Price, Vanderbilt University Medical Center (United States)
A. Everette James, Jr., Vanderbilt University Medical Center (United States)

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