Department of Radiology, Stanford University School of Medicine, Stanford, CA, USA. Electronic address: m.j.willemink@gmail.com. Department of Radiology, University Medical Center Utrecht, Utrecht, the Netherlands. Electronic address: n.r.vanderwerf@umcutrecht.nl. Department of Radiology, Stanford University School of Medicine, Stanford, CA, USA; Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA. Electronic address: knieman@stanford.edu. Department of Radiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands. Electronic address: m.j.w.greuter@umcg.nl. Department of Radiology, DCIS, Duke University School of Medicine, Durham, NC, USA. Electronic address: lynne.koweek@duke.edu. Department of Radiology, Stanford University School of Medicine, Stanford, CA, USA; Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, USA. Electronic address: d.fleischmann@stanford.edu.