1. From the Department of Radiology and Interventional Radiology, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland (R.D., A.D.); Archimmed SARL, 12 rue Charles de Gaulle, Jouy-en-Josas 78350, France (J.N., F.P.); and Biocompatibles UK, a BTG International Group company, Camberley, England (P.C., Z.B., H.K., R.W., S.R., A.L.L.).