Andreas Grl1, Wolfgang Renz2, Fabian Hezel1, Tobias Frauenrath1, Harald Pfeiffer3, Werner Hoffmann3, Peter Kellman4, Conrad Martin1, Thoralf Niendorf1, 5
1Berlin Ultrahigh Field Facility, Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany; 2Siemens Healthcare, Erlangen, Germany; 3Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany; 4Laboratory of Cardiac Energetics, National Institutes of Health/NHLBI, Bethesda, MD, United States; 5Experimental and Clinical Research Center (ECRC), Charit Campus Buch, Humboldt-University, Berlin, Germany
Ultrahigh field cardiac MR is challenged by non-uniform B1+-distributions. A modular two-dimensional 32-channel transceiver surface coil array based on loop elements is proposed to improve parallel imaging and B1+ homogeneity for cardiac MR at 7 T. The RF characteristics were satisfying without the need for subject-specific tuning and matching. MR images were acquired showing a rather uniform intensity over the whole cardiac region and a high myocardium/blood contrast without subject-specific B1+-shimming.