||Volume visualization has been driven by the advances of medical image acquisition, since most of the modern imaging devices produce 3D image volumetric data. Usually, projection needs to be employed on the numerical description of a volumetric data, to get desired information. These volumetric data are hard to effectively visualize since 3D structures of the interior of a volume are difficult to derive from viewing individual slices. Volume visualization methods make it possible to give a better 3D perception by integrating these slices together in a volume that can be seen from any viewpoint and containing shading effects, as well as small variations in density and opacity. In this seminar, some significant visualization techniques for medical data will be presented.