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A complex way to compute fMRI activation

By Daniel B. Rowe A and Brent R. Logan B

Abstract

In functional magnetic resonance imaging, voxel time courses after Fourier or non-Fourier bimage reconstructionQ are complex valued as a result of phase imperfections due to magnetic field inhomogeneities. Nearly all fMRI studies derive functional bactivationQ based on magnitude voxel time courses [Bandettini, P., Jesmanowicz, A., Wong, E., Hyde, J.S., 1993. Processing strategies for time-course data sets in functional MRI of the human brain. Magn. Reson. Med. 30 (2): 161-17

Topics: Functional magnetic resonance imaging, Magnetic field inhomogeneities, Voxel
Year: 2004
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