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Demonstration of ROI placement. The placement of the ROIs (red circles with a diameter of 5 mm) was determined on the color-coded standard fractional anisotropy (FA) atlas, and these ROIs were placed in the bilateral projection fibers (blue area) and association fibers (green area) in FA atlas, respectively (A). Then, these ROIs were placed on the diffusivity maps (spatially normalized) in the direction of the x-axis (B), y-axis (C), and z-axis (D).
