Meeting Banner
Abstract #0305

Design, Evaluation & Application of a Modular 32-Channel Transmit/Receive Surface Coil Array for Cardiac MRI at 7T

MAGNA25Andreas 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.

Abstract PDF Presentation Video

Keywords

acquisition adjustable affords alway amplifier anatomic anatomical anterior appealing appropriate arranged array axis basic bend biology blood boxes breath broad built cable cables cardiac challenges challenging channel channels cine coefficients coil combining common comprises conductors conjunction connected coupling deep depiction derived design designs dimensional distance elem element elements enabled enabling energetics enhance enhanced equipped evaluation examines excellent experimental facility family fashion field fields flash gang health heart hold home includes inhomogeneities institutes laboratory lightweight long loop made mannequin many martin matching matrix medicine mental ming models modular modulations module modules molecular move muscles neighboring network noise output overall papillary part peak performance pericardium pioneering placed posed positioning posterior potential power prop proposed quality radiation rather realized receive reduce regarded resolution retrospective scheme section share short since slice spatial splitting spoil structures studio subject subjects suite supports switch tackle together torso towards transmit trend ultrahigh unbalanced uniform valves view voids width yielded