Provided is an image processing system capable of creating a profile curve along the major axis direction of a striatum from three-dimensional image data of the brain. The image processing system (1) sets a region of interest (ROI) covering the striatum to be diagnosed with respect to each of the right hemisphere and the left hemisphere of the brain in the three-dimensional image data of the brain obtained using the image diagnostic agent having the property of accumulating the striatum, and an axis connecting the representative point representing the end of the frontal region of the ROI with the representative point representing the end of the occipital region of the ROI is set for each ROI. Then, the image processing system (1) sets a plurality of cross sections perpendicular to the axis for each region of interest, extracts the maximum value of the pixel values indicating the degree of integration of the image diagnostic agent in each cross section, and the maximum value of the pixel values is displayed in relation to the position of the section on the axis.
Image processing system