1Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States, 2Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany, 3Clinic for Radiology and Nuclear Medicine, Basel University Hospital, Basel, Switzerland, 4Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States, 5Department of Emergency Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States, 6Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States, 7Department of Biomedical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States