Abstract #3197
7T MRSI using Semi-Adiabatic Spectral-spatial Spectroscopic Imaging (SASSI) for improved B1-insensitivity in refocusing and reduced chemical shift artifact
Rebecca Emily Feldman 1 and Priti Balchandani 1
1
Radiology, Icahn School of Medicine at Mount
Sinai, New York, New York, United States
High magnetic fields permit us to leverage increased
signal-to-noise ratio and spectral separation between
metabolite peaks for more sensitive metabolite detection
and quantification as well as higher resolution spectral
grids. With high field strengths come challenges such as
increased RF power deposition, B1-inhomogeneity, and
increased chemical shift artifacts. We used the
adiabatic Shinnar Le-Roux algorithm to create a
Semi-Adiabatic Spectral-spatial Spectroscopic Imaging
(SASSI) sequence to capture the main metabolites at 7T.
The sequence was designed to generate spectroscopic
grids with improved B1-immunity and reduced chemical
shift artifact while having lower SAR than existing
adiabatic implementations.
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