This is just a colorization of a whole body scan, probably MRI since the cortex of bone is black but hard to tell because of all the post processing.  Someone went through and added the colors to make it more understandable by people who are not used to looking at medical imaging.  The brain colorization was accidental. Excess adipose is not deposited in the human brain, though you do have a fair amount of lipids in your white matter from myelin.