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Abstract #0940

Motion correction for functional MRI with hybrid radial-Cartesian 3D EPI

Nadine N Graedel1, Mark Chiew1, and Karla L Miller 1

1FMRIB Centre for Functional MRI of the Brain, University of Oxford, Oxford, United Kingdom

We used a hybrid radial-Cartesian 3D EPI trajectory with a golden ratio based angle update to perform retrospective motion correction in severely motion corrupted fMRI data. Motion estimates were based on high temporal resolution image timeseries and and k-space based estimates. The calculated rotations and translations were corrected in k-space prior to the final reconstruction, allowing the correction of both inter- and intra-volume motion artifacts. This approach is self-navigated, requires no additional hardware and is suitable for correction in fast fMRI acquisition.

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