Registration of Chest X-Rays

摘要

Doctors often want to compare X-ray images of one patient made at different times. In case of chest X-ray analysis it is hard to find the typically small differences of the two images. A software supporting this method could help them a lot. We analyzed the possible methods and developed a prototype of a feature-based registration software. Characteristic pairs of points were used for the registration transformation. These points were found automatically on the contour and in the inner part of the lung. Several transformations (rigid and non-rigid ones) were examined to find the best one for registration.