1. A computer based method of visualizing a region using multiple image data sets comprising: acquiring first volumetric image data of a region; acquiring at least second volumetric image data of the region; determining structural features of the region using the first volumetric image data determining at least one control point in the region using at least one structural feature in the first volumetric image data; identifying the at least one control point in the region in the at least second image data of the region; registering the first image data and the at least second image data using said at least one control point; and fusing the registered first image data and at least second image data into a common display data set.