Snapshot of each step in the proposed segmentation procedure. (a) Individual T1 image. (b) Roughly defined cerebellar region using skull mask and brain mask. Cerebellar region candidate A. (c) Improvement in defining the cerebellar region via the CSF partial volume estimation map. (d) Trimming of the cerebellar region using a morphological operator. Cerebellar region candidate B. (e) Removal of brain stem and cerebellar peduncle using template-based segmentation. (f) Final result.