1 Institute for Diagnostic and Interventional Radiology, Georg-August-University Göttingen, Göttingen, Germany; German Centre for Cardiovascular Research (DZHK), partner site Göttingen, Göttingen, Germany.
2 Department of Cardiology and Pneumology, Georg-August-University Göttingen, Göttingen, Germany; Division of Imaging Sciences and Biomedical Engineering, The Rayne Institute, St. Thomas' Hospital, King's College London, London, United Kingdom; and German Centre for Cardiovascular Research (DZHK), partner site Göttingen, Göttingen, Germany andreas_schuster@gmx.net.