A Technique For Automatic Motion Correction In DSA
David R. Pickens, J. Michael Fitzpatrick, John J. Grefenstette, Ronald R. Price, A. Everette James · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1986
The motion of the contracting heart has made it impossible to study coronary arteries with venous injections of contrast using digital subtraction angiography (DSA), even with cardiac gating. Furthermore, for intravenous injections, the images are statistically very poor due to the small size of the vessels and dilution of the contrast media, rendering the images diagnostically useless. A technique based on polynomial transformations has been implemented and is being evaluated which permits removal of motion between a pair of images acquired during mask-mode DSA. This technique is capable of handling three-dimensional motion and is based on applications of techniques of fluid dynamics, statistical sampling theory, and artificial intelligence. A series of phantom images, exhibiting three dimensional motion, are shown which demonstrate the ability of the technique to remove motion.