1Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbrück Center for Molecular Medicine, Berlin, Germany, 2Department of Physics, Technische Universität Berlin, Berlin, Germany, 3Physikalisch Technische Bundesanstalt (PTB), Berlin, Germany, 4Berlin Center for Advanced Neuroimaging, Charité - Universitätsmedizin, Berlin, Germany, 5Department of Radiology, Stanford University, Stanford, CA, United States, 6Athinoula A. Martinos Center for Biomedical Imaging, Harvard Medical School, Massachusetts General Hospital, Charlestown, MA, United States, 7Gorter Center for High Field MRI, Leiden University Medical Center, Leiden, Netherlands, 8Institute of Physics, University of Mainz, Mainz, Germany, 9Experimental and Clinical Research Center (ECRC), a joint cooperation between the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine, Berlin, Germany, 10MRI.TOOLS GmbH, Berlin, Germany