Department of Cardiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Ulmenweg 18, 91054, Erlangen, Germany. stephan.achenbach@uk-erlangen.de. Department of Radiology, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France. University of Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, F-33000, Bordeaux, France. CHU de Bordeaux, Service d'Imagerie Thoracique et Cardiovasculaire, F-33600, Pessac, France. Department of Clinical Radiology, University Hospital Grosshadern, Munich, Germany. Department of Radiological Sciences, Oncology and Pathology, Sapienza - University of Rome, ICOT Hospital, Latina, Italy. Department of Radiology, University Hospital of Rouen, Rouen, France. Department of Radiology, Saint Gallen Hospital, Saint Gallen, Switzerland. Department of Radiology, Cochin Hospital, Paris, France. Department of Radiology, La Charité, Berlin, Germany. Ospedale del Delta, Ferrara, Italy. Elisabeth-Krankenhaus Hospital, Essen, Germany. Hospital Vall d'Hebron, Barcelona, Spain. Hospital Clinico San Carlos, Madrid, Spain. Department of Radiology, La Timone Adult Hospital, Marseille, France. Complejo Hospitalario Universitario, Santiago de Compostela, Spain. Department of Radiology, Louis Pradel Hospital, Lyon, France. Department of Radiology, University of Lausanne, Lausanne, Switzerland. Department of Radiology, Giovanni XXIII Hospital, Monastier di Treviso, Italy.