An MRI brain image is chosen from the database of brain images to be pre-processed. Soft brain
tissues such as WM, GM and CSF are surrounded by outward bone structure. A slice is selected
on the brain image with bones using MRIcroN software. The segmentation accuracy depends on
the slice selection; manual process is followed to select a slice of the displayed brain image
(Figure 9). Finally, the selected slice is converted into two dimensional image format using
MATLAB code.