Abstract #1305
Four Channel Transceiver Array for Functional Magnetic Resonance Spectroscopy in the Human Visual Cortex at 9.4 T
Andreas Pfrommer 1 , Nikolai Avdievich 1 , and Anke Henning 1,2
1
Dept. of High-Field Magnetic Resonance, Max
Planck Institute for Biological Cybernetics, Tbingen,
Baden-Wrttemberg, Germany,
2
Institute
for Biomedical Engineering, University and ETH Zrich,
Zrich, Switzerland
RF coils for functional magnetic resonance spectroscopy
at ultra-high field strength must be designed with high
SNR, high transmit efficiency and optimized to guarantee
SAR safety. With numerical EM simulations we compared
two possible 4 channel RF coil setups for the
application in the human visual cortex. It turned out
that overlapping loop elements can provide 12.5 % more
B1+ /√SAR(10g) than without overlap for this particular
case. Based on the simulation we have constructed a
tight fit 4-channel transceiver head phased array. We
could reach a B1+ of 63 T in a 12.4x12.4 mm sized
voxel in the visual cortex region in a human
head-and-shoulder phantom.
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