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Abstract #0891

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

Amir Seginer1, Edna Furman-Haran2,3, Ilan Goldberg4, and Rita Schmidt3,5
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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