K-edge Subtraction X-ray Imaging : Improvement of Image Quality

Abstract

Two X-ray images, one taken by higher photon energy X-ray and the other taken by lower one, were recorded on laser videodisc. Then they were computer-processed in order to improve the image quality. From a medical point of view, by the use of a noise reduction method-median filtering, less noisy and fairly good images of the canine coronary arteries were obtained.