1. From the Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Raemistrasse 100, CH-8091 Zurich, Switzerland (T.S., A.L., D.N., M.E., C.R., V.M., K.H., H.A., A.E.); Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht University, Maastricht, the Netherlands (T.S.); and Siemens Healthcare, Forchheim, Germany (R.R.).