1. Department of Radiology, Medical Physics; University Medical Center; Freiburg Germany
2. Department of Radiology; Stanford University; Stanford California USA
3. Department of Neuroradiology; University Medical Center; Freiburg Germany
4. Department of Neurology and Clinical Neurophysiology; University Medical Center; Freiburg Germany
5. Department of Microsystems Engineering - IMTEK; University of Freiburg; Germany
6. Freiburg Institute of Advanced Studies (FRIAS); University of Freiburg; Germany