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Abstract #4403

Imaging the Kidneys at 7T Using 8Tx/32Rx Abdominal Coil and RF Shimming of Individual Slices

Niravkumar Darji1, Martin Haas2, Gopesh Patel1, Oliver Speck1, Inge Brinkmann2, Michael Bock2

1Department for Biomedical Magnetic Resonance, magdeburg, Sachsen anhalt, Germany; 2Department of Radiology, Freiburg, Baden-Wrttemberg., Germany

B1 field inhomogeneity become increasingly problematic in ultrahigh-field (UHF) strengths (7T). Parallel transmition is introduced to reduce B1 inhomogeneity. In abdominal imaging region like Kidney or spine shows more structural visibility after performing RF shimming on individual channels of the 8Tx/32Rx abdominal RF coil. The T2* maps also reflect the more homogeneous signal distribution after RF shim perfomance.

Keywords

abdomen abdominal acknowledgments addition amplitude angiography anterior applications arranged arrows arterial artery assessment assuming baden better biomedical bock body bold calculations challenging channel channels clinical coil coils combined combining comparing comprises connected consisting console constraints containing coronal decay dedicated dependency depicts deviation differentiation distribution duke echoes effectively electric element elements engineering especially excitation experimentally exponential family field filtration flash flat foundation functional grant gratefully halves homogeneity homogeneous human identical implementation imposing improves individual inhomogeneity invest kidney kidneys lack least limit local loop magnitude many maps marked martin measure measured metastasis mode model modeled modes mono necessary notable novel operation oriented parallel part particular partner pilot placed placement power project quasi radiology reduced reflect renal resolution resonators rich saturated scaling screening settings shim shimmed shimming simulated slice slices smoothing speck spine strength strengths strip subjects suited superposition support system target team thresholding together tool transmission transmit viii village virtual volunteer whole worst