An algorithm for correcting X-ray image distortions caused by central projection

Abstract

We propose an algorithm for correcting X-ray image distortions caused by central projection. Relationships between coordinates of X-ray image points obtained using parallel and central projection are derived. We describe two correction techniques using which the original image can be made similar to the one based on parallel projection. In this way, the three-dimensional heart vessel model can be essentially simplified and diagnostic parameters can be assessed with higher accuracy, resulting in a more accurate early disease diagnosis.