J Meincke1, N Lützen1, S Doostkam2, H Urbach3. 1. Dept. of Neuroradiology, Medical Center, University of Freiburg, Breisacher Straße 64, 79106, Freiburg im Breisgau, Germany. 2. Dept. of Neuropathology, University of Freiburg, Breisacher Straße 64, 79106, Freiburg im Breisgau, Germany. 3. Dept. of Neuroradiology, Medical Center, University of Freiburg, Breisacher Straße 64, 79106, Freiburg im Breisgau, Germany. horst.urbach@uniklinik-freiburg.de.