Abstract #2924
Sodium B 1 mapping at 9.4 T
Christian C. Mirkes 1,2 , G. Shajan 1 , Jens Hoffmann 1 , Daniel Brenner 3 , Rolf Pohmann 1 , and Klaus Scheffler 1,2
1
High-Field MR Center, Max Planck Institute
for Biological Cybernetics, Tbingen, BW, Germany,
2
Department
for Biomedical Magnetic Resonance, University of
Tbingen, Tbingen, BW, Germany,
3
MR
Physics, German Center for Neurodegenerative Diseases (DZNE),
Bonn, NRW, Germany
Accurate sodium B
1
field
mapping is a key requirement for quantitative sodium
imaging at ultra-high field strength. In this study the
performance of three B
1
mapping
techniques was evaluated in a phantom at 9.4 T. Compared
to the double angle and the Bloch-Siegert shift based
methods, the phase sensitive method provided the most
reliable maps, especially in regions of weak B
1
.
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