The development of multidetector-row CT(MDCT), which can rapidly scan a large longitudinal volume and enables us to obtain thinner section collimation with a shorter acquisition time, obtained isotropic voxel data for three-dimensional(3D) imaging. Isotropic voxel data enables us to obtain sagittal and coronal images with the spatial resolution which is identical to axial images. Excellent volume data, which was acquired by MDCT, obtain serviceable 3D images by using various reconstruction methods, such as multi-planar reconstruction(MPR), maximum intensity projection(MIP), minimum intensity projection(MinIP), surface rendering, volume rendering and virtual endoscopy. However, relation between Ct and MRI is still complementary even in the times of MDCT.