1Lund Cardiac MR Group, Department of Clinical Physiology, Lund University, Lund, Sweden, 2Department of Computer Science and Biomedical Informatics, University of Thessaly, Lamia, Greece, 3Department of Medical Physics, School of Medicine, University of Patras, Patras, Greece, 4Laboratory of Medical Informatics, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece