Qualitative comparison of ASM (1st column, red), MALF (2nd column, green), and AASM (3rd column, blue) segmentation of SC. (a)–(e) Slices at five different locations (from bottom to top) on one subject. (f) 3-D surface renderings of the segmented GM (left) and WM (right) colored in the surface distance error toward the corresponding manual segmentations.