1. Clinic for Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany;
2. Department of Neuroradiology, University Hospital Heidelberg, Heidelberg, Germany;
3. Clinic for Radiology, Minimally-Invasive Therapies and Nuclear Medicine, SLK Kliniken Heilbronn GmbH, Heilbronn, Germany;
4. Medical Physics in Radiology, German Cancer Research Center (Dkfz), Heidelberg, Germany;
5. Clinic for Diagnostic and Interventional Radiology, Klinikum Stuttgart, Stuttgart, Germany