1. Department of Diagnostic and Interventional Radiology, Universitätsklinikum Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg
2. Department of Diagnostic and Interventional Radiology, Eberhard-Karls-University Tübingen, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany
3. Institute of Pathology and Neuropathology, Eberhard-Karls-University Tübingen, Liebermeisterstraße 8, 72076 Tübingen, Germany
4. Section on Experimental Radiology, Eberhard-Karls-University Tübingen, Hoppe-Seyler-Str. 3, 72076 Tübingen, Germany
5. Department of Radiology and Nuclear Medicine, Franziskus Hospital Bielefeld, Kiskerstraße 26, 33615 Bielefeld, Germany