Meeting Banner
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.

Abstract PDF Presentation Video

Keywords

absolute account active adapted additionally allowed anatomical applied array assessed assessing assure blood body cable carried channel close coil coils combination complete compliance conductors confirmed contour coupling dated decoupling derived detailed determine determined developed differ ding distortions distribution distributions duration eight element elements elevation elevations equation exceeded exceeding excellent excitation exposure feeding fiber field finally findings flexibly flow frequencies germ heat highest housing human in vivo independent individual induced inflatable influence input inserted interestingly intern lead least limit limits local localize localized located location many mark mate materials maximal meander measure measured metabolic minute mode model monitoring moreover national near numerical operate operating optic overestimates owed perm permissible ports positioned power predicted presence previous produce prostate radiating radiology reached rectum relevant safe safety settings shim shimming simulation simulations since studio suite surface system take temp temperature therm thermal tissue tissues transfer transmit tuned unpredictable upper valid validate validation visible volunteer whereas whether whole