Abstract #3201
Towards routine application of dynamic parallel transmission for whole-brain imaging at 9.4 Tesla
Jens Hoffmann 1,2 , G. Shajan 1 , Christian Mirkes 1,3 , Tingting Shao 1 , Anke Henning 1,4 , Rolf Pohmann 1 , and Klaus Scheffler 1,3
1
High-Field Magnetic Resonance Center, Max
Planck Institute for Biological Cybernetics, Tuebingen,
Germany,
2
Graduate
School of Neural & Behavioural Sciences, Tuebingen,
Germany,
3
Department
for Biomedical Magnetic Resonance, University of
Tuebingen, Germany,
4
Institute
for Biomedical Engineering, University and ETH Zurich,
Switzerland
The requirements for implementing a multi-purpose,
pTx-enabled RF setup for whole-brain imaging at 9.4
Tesla are high. They include transmit arrays with
sensitivities distributed in all dimensions, receive
hardware for high-SNR parallel signal reception,
numerical simulations for compliance with SAR limits as
well as rapid, volumetric calibration scans. In this
work, we report our progress in achieving these
objectives. A 16-channel dual-row Tx / 31-channel
Rx-array combination was interfaced to an 8-channel pTx
system. SAR was evaluated numerically, rapid calibration
scans were acquired using a 3D DREAM sequence and
superior excitation quality using Spokes pulses is
demonstrated in vivo.
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