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Brain image processing. A, Gray-scale image (top) from a representative monkey is segmented into CSF, gray, and white matter (top to bottom, respectively) with darker voxels depicting larger proportions of each tissue type. B, Multiplanar views of a gray-scale image show the stereotaxic Talaraich-like grid (dotted lines) used for parcellation of the brain image stack into four three-dimensional quadrants (solid lines).
