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Abstract #2992

3D Radial GRE-EPI with up to 8-fold acceleration for functional imaging at 9.4T

Philipp Ehses 1,2 , G. Shajan 1 , and Klaus Scheffler 1,2

1 High-Field MR Center, Max Planck Institute for Biological Cybernetics, Tbingen, Germany, 2 Dept. of Biomedical Magnetic Resonance, University of Tbingen, Tbingen, Germany

Increasing acquisition speed is beneficial in fMRI since it increases statistical power and allows the separation of physiological noise from the time series. An effective means to achieve this speed is to combine EPI with parallel imaging. 3D EPI allows very high parallel imaging factors since acceleration can be performed in both phase-encoding directions. Non-Cartesian parallel imaging can potentially allow even higher acceleration by exploiting coil sensitivities in all three dimensions. To this end, a 3D radial EPI sequence was developed and first results with up to 8-fold radial GRAPPA acceleration are presented from finger tapping experiments at 9.4T.

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