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Abstract #0311

RF Safety of the Combination of a 31P Tx/Rx Endorectal Coil & a 1H Tx/Rx Body Array for 31P MRSI of the Prostate at 7T

Andreas K. Bitz1, 2, Thiele Kobus3, Tom W. J. Scheenen, 13, Mark E. Ladd1, 2

1Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany; 2Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany; 3Department of Radiology, Radboud University Nijmegen Medical Centre, Nijmegen, Netherlands

To relate information of cancer-related metabolites to anatomical location within the human prostate, a 31P endorectal coil (ERC) was combined with an 8-channel 1H body array. For compliance testing, RF coupling between both coils was investigated. The compliance test for the coil combination was performed by simulation and in vivo measurements. It could be shown that both coils are well decoupled at both operating frequencies. Whereas the maximum permissible input power of 33 W for the body array was derived from SAR simulations, the maximum permissible input power of 1.9 W for the ERC was derived from in vivo temperature measurements.