Abstract #1463
Shaped Saturation with RF Power Efficient 2D Spatially Selective Spiral Design in Parallel Transmission
Rainer Schneider 1,2 , Jens Haueisen 2 , and Josef Pfeuffer 1
1
MR Application Development, Siemens
Healthcare, Erlangen, Bavaria, Germany,
2
Institute
of Biomedical Engineering and Informatics, TU Ilmenau,
Ilmenau, Thuringia, Germany
Shaped saturation human in-vivo experiments were
realized for the first time on the basis of
multidimensional spatially selective RF pulses in
parallel transmission. For this purpose, a
variable-density 2D spiral trajectory design was
introduced, which offers inherent RF power efficiency by
incorporating the a-priori information of the target
pattern and available B1 magnitude. The design was
evaluated in sagittal head and t-spine experiments,
saturating different patterns at 3T. The proposed
approach was shown to offer up to 32% improved spatial
accuracy and saturation performance under given RF
hardware and SAR constraints.
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