Comparison of Two Restoration Techniques in the Context of 3D Medical Imaging

In this paper, we compare two restoration techniques applied to 3D angiographies and to femoral CT scans. The rst technique uses a Partial Derivative Equation and the second one is based on an extension of adaptive Wiener lters. We rst present each method. Then, we discuss and compare the estimation of the local orientations in 3D images obtained either by the smoothed gradient and the principal curvature directions or by the eigenvectors of the structure tensor. A good estimation of the orientations is essential because it directs the restoration process. Finally, we compare the restored images on both synthetic and real images for the two studied applications.