Abstract #3177
Asymmetric Transceiver Phased Array for Functional Imaging and Spectroscopy of the Visual Cortex at 9.4 T
Nikolai I Avdievich 1 , Ioannis A Giapitzakis 1 , and Anke Henning 1,2
1
Max Planck Institute for Biological
Cybernetics, Tbingen, Germany,
2
Institute
for Biomedical Engineering, UZH and ETH Zurich, Zurich,
Switzerland
Ultra-high field (>7T) RF coil design is challenging due
to decreased transmit efficiency and strongly distorted
B1 field profile. For functional SI of the visual cortex
open RF coils are highly suitable since they provide an
easy access and increased transmit efficiency by
focusing RF field. In this work we demonstrated that a
9.4T 5-channel array with asymmetric arrangement of 4
transmit and 4 receive elements improves the transmit
profile without compromising the reception. We also
evaluated changes in the transmit efficiency,
penetration depth and SAR due to variation in the array
size and the phase shift between the elements.
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