1. Institute of Medical Physics, Klinikum Nurnberg, Paracelsus Medical University, Nurnberg, Germany
2. Institute for Diagnostic and Interventional Radiology, University Medical Center Gottingen, Gottingen, Germany
3. Institute for Diagnostic Radiology and Nuclear medicine, Braunschweig Municipal Hospital, Braunschweig, Germany
4. Medizinphysik-Experten für sonstige Einrichtungen, Charite University Hospital Berlin, Germany
5. External and Internal Dosimetry, Biokinetics, Federal Office for Radiation Protection Neuherberg, Germany