In this work, we develop a 3-D to 1-D ordering methodology for fMRI data, using a space filling curve, which is adaptive to brain's shape. We apply this ordering to fMRI activation maps from a schizophrenia study, compress the data, obtain features, and perform classification of schizophrenia vs normal controls. We compare the classification results with those of linear ordering, which has been the traditional method to convert the 3D fMRI data to 1D.
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