Two X-ray Images, one taken by higher photon energy X-ray and the other by lower one, were recorded on laser videodiscs. Then they were computer-processed in order to produce images of the vascular injected contrast material (iodine) and to improve the image quality, the resultant images were recorded on a laser video disc and displayed at real (original) frame rate. Fairly good images of the canine coronary arteries were obtained. The X-ray condition and the output image quality were analysed.
