The quantification of a morphological or physiological parameter of one or more lipids in brain, the portion of the central nervous system enclosed within the cranium which is composed of gray matter and white matter and is the primary center for the regulation and control of bodily activities, receiving and interpreting sensory impulses, and transmitting information to the muscles and body organs. Lipids are any of a structurally diverse group of organic compounds that are insoluble in water but soluble innonpolar solvents that, among other biological functions, serve as a source of fuel and are an important constituent of cell structure.