F-H Cornelis1, S-B Solomon2. 1. Department of Interventional Radiology and Oncology, Assistance Publique-hôpitaux de Paris, hôpital Tenon, 4, rue de la Chine, 75020 Paris, France. Electronic address: francois.cornelis@aphp.fr. 2. Department of Interventional Radiology, Memorial Sloan-Kettering Cancer Center, 1275, York Avenue, New York, NY 10065, USA.