1Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway, 2St Olavs Hospital, Trondheim, Norway, 3Department of Radiology, St Olavs Hospital, Trondheim, Norway, 4Department of Pathology, St Olavs Hospital, Trondheim, Norway, 5Department of Urology, St Olavs Hospital, Trondheim, Norway, 6Department of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway