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Abstract #1721

Induced Correlation in FMRI Magnitude Data from K-Space Preprocessing

Daniel B. Rowe1, Andrew S. Nencka1

1Department of Biophysics, Medical College of Wisconsin, Milwaukee, WI, USA

Correlations between image-space voxels over time have been used to identify functionally connected regions of the cortex of subjects in the resting state. The common pre-processing techniques that are applied to fMRI k-space data before image reconstruction and before magnitude image formation can induce image-space voxel correlations. Since connectivity inferences are based upon image-space correlations, one must quantify and account for such pre-processing induced correlations. This framework allows the quantification and removal of these induced correlations. This will enhance and refine all future fMRI connectivity studies.