FIGURE 2.  Axial MR images from healthy subject (top row) and patient with symptomatic HD (bottom row). Note smaller fGM and fWM volumes in patient with HD than in healthy subject. Slices represent R1 and R2 relaxation rates and corresponding segmented images. Segmented images are coded gray for GM, white for WM, blue for CSF, green for putamen, and bright red for globus pallidus.