Abstract #0891

Lipid and water separation through an SMS-like approach in 7T to reduce SAR in brain EPI

Amir Seginer¹, Edna Furman-Haran^2,3, Ilan Goldberg⁴, and Rita Schmidt^3,5

¹Siemens Healthcare, Rosh Ha'ayin, Israel, ²Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel, ³The Azrieli National Institute for Human Brain Imaging and Research, Weizmann Institute of Science, Rehovot, Israel, ⁴Deparment of Neurology, Wolfson medical center, Holon, Israel, ⁵Neurobiology Department, Weizmann Institute of Science, Rehovot, Israel

We examine the potential to significantly reduce SAR in 7T fMRI (GRE-EPI) by circumventing the fat-suppression pulse. The resulting (shifted) lipid artifact is resolved by a parallel-imaging based reconstruction which separates the lipid and water images. Simulations, phantom experiments, and fMRI experiments were performed with the suggested method. SAR was shown to be reduced to less than half, allowing to shorten the repetition time and/or increase the volume coverage in fMRI studies.

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