1. Center for Medical Physics & Biomedical Engineering, Medical University Vienna, Austria
2. Clinical Physics Laboratory, UMC St Radboud Nijmegen, The Netherlands
3. Medical Physics, United Lincolnshire Hospitals NHS Trust, U.K.
4. Gruppenpraxis für Radiologie, Vienna, Austria
5. Department of Medical Physics, University Hospitals of Leicester, U.K.
6. Department of Cardiovascular Sciences, University of Leicester, U.K.