1. A method for performing virtual examination of an object comprising: performing at least one scan of an object with the object distended by the presence of a contrast agent; performing at least one scan of the object with the object relieved of the contrast agent; converting the scans to corresponding volume datasets comprising a plurality of voxels; performing image segmentation to classify the voxels of each scan into a plurality of categories; registering the volume datasets of each scan to a common coordinate system; displaying at least two of the volume datasets in a substantially simultaneous manner; and performing virtual navigation operations in one of the volume datasets and having the corresponding navigation operations take place in at least one other volume dataset.