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Abstract #0395

A Two-Dimensional 16 Channel Dipole Transceiver Array for Cardiac MR at 7.0 T: Design, Evaluation of RF Shimming Behavior and Application in CINE Imaging

Andreas Graessl1, Lukas Winter1, Celal zerdem1, Fabian Hezel1, Katharina Fuchs1, Harald Pfeiffer2, Werner Hoffmann2, Thoralf Niendorf1, 3

1Berlin Ultrahigh Field Facility, Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany; 2Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany; 3Experimental and Clinical Research Center (ECRC), Charit Campus Buch, Humboldt-University, Berlin, Germany

A two-dimensional 16-channel transceiver array based on dipole elements is designed and applied to Cardiac MR (CMR) at 7.0 Tesla. Dipole Antennas are a promising approach to provide a homogeneous B1+ field distribution and good transmit efficiency in the short wavelength regime of Ultrahigh field MRI. RF efficiency optimization is applied and assessed for slice-by-slice shimming based on simulation data. The transition to in-vivo studies succeeded and revealed excellent B1+-homogeneity and a high myocardium/blood contrast over the whole cardiac region with a single RF shim setting and without subject-specific B1+-shimming or element retuning.

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Keywords

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