From the Division of Image Processing (R. J. van der Geest and J. H. C. Reiber) and Departments of Radiology (R. J. van der Geest, R. A. Niezen, A. de Roos, and J. H. C. Reiber) and Cardiology (E. E. van der Wall and J. H. Reiber), Leiden University Medical Center, Leiden, and Interuniversity Cardiology Institute of The Netherlands, Utrecht (R. A. Niezen, E. E. van der Wall, A. de Roos, and J. H. C. Reiber), The Netherlands.