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Abstract #1163

Characterization and Correction of Physiological Instabilities in 3D FMRI

Rob Hendrikus Tijssen1, Steve M. Smith1, Peter Jezzard1, Robert Frost1, Mark Jenkinson1, Karla Loreen Miller1

1FMRIB Centre, Oxford University, Oxford, Oxon, United Kingdom

3D FMRI acquisitions have the advantage of allowing high resolution, isotropic, imaging. However, 3D acquisitions, such as SSFP and SPGR, show increased signal instabilities in the inferior regions of the brain. Here, we present a characterization of these temporal instabilities and propose a GRAPPA-based correction method that allows retrospective gating of 3D FMRI data.