Abstract #0622
Tranceive Phased Array with high Transmit Performance for Human Brain Application at 9.4 T
Nikolai I. Avdievich 1 , Andreas Pfrommer 1 , Jens Hoffmann 1 , Grzegorz L. Chadzynski 1,2 , Klaus Scheffler 1 , and Anke Henning 1,3
1
Max Planck Institute for Biological
Cybernetics, Tbingen, Germany,
2
Department
of Biomedical Magnetic Resonance, University Hospital
Tbingen, Tbingen, Germany,
3
Institute
for Biomedical Engineering, University and ETH Zurich,
Zurich, Switzerland
Surface loop phased arrays have been shown to improve
transmit performance and B1 homogeneity for head imaging
up to 9.4T. However, transmit arrays enlarged to fit
receive arrays often cannot satisfy the requirements in
B1 and bandwidth for ultra-high field spectroscopic
imaging. We have developed and constructed a tight fit
400MHz 8-channel transceiver array. The array improved
transmit efficiency and homogeneity in the axial slab
through the phantoms center when used in CP mode. B1+
averaged over the central axial slice measured 55.6 nT/V,
which corresponds to 12.4 uT per 1 kW of RF power
delivered directly to the array.
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