High field MRI permits us to leverage increased signal-to-noise ratio (SNR) and spectral separation between metabolite peaks for more sensitive metabolite detection at higher spatial resolutions. However, the acquisition of high-resolution spectral grids can be prohibitively time intensive. Accelerated MRSI acquisitions are challenged by the limitations at 7T. We develop a multi-region SPSP excitation pulse and use it to create a novel low power, B1 insensitive multi-region SASSI sequence with minimal chemical shift to enable accelerated MRSI.
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