Abstract
DSA(digital subtraction angiography) is a valuable method in ragiology. But, the diagnostic worth of DSA may easily be spoiled by misregistration artifact. For this reason, a procedure to reduce the artifact is needed. We propose a new method for the reduction. In the method, a motion vector detection technique to find slippage between two images in used. Motion vectors include the vector that is derived from subject and that from flow of contrast medium. To distiguish the two, we utilize a fuzzy inference. The usefulness of the misregistration artifact reduction method was confirmed by a simulation test.
