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Abstract #4283

Body imaging at 7T: Comparison of the transmit/receive performance of microstrip antennas and fractionated dipoles

Jonathan K. Stelter1, Andreas K. Bitz1,2, Mark E. Ladd1,3,4, and Thomas M. Fiedler1
1Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, 2Electromagnetic Theory and Applied Mathematics, Faculty of Electrical Engineering and Information Technology, FH Aachen – University of Applied Sciences, Aachen, Germany, 3Erwin L. Hahn Institute for MRI, University Duisburg-Essen, Essen, Germany, 4Faculty of Physics and Astronomy and Faculty of Medicine, University of Heidelberg, Heidelberg, Germany

The transmit and receive performance of 8-channel array configurations of microstrip antennas with meander structures and fractionated dipoles was evaluated at 7T using numerical simulations. Simulations with a homogenous phantom and an anatomical body model use similar parameters to facilitate direct comparison. The microstrip antenna array configuration provides higher SNR than the fractionated dipole array configurations and shows superior RF shimming performance for large-FOV transverse and coronal slices, whereas single-element simulations estimate similar SAR efficiencies. The RF shimming performance of the array configurations does not differ significantly for smaller ROIs as evaluated for prostate imaging.

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