A method for densitometric analysis of a computed tomography image is provided. The method includes converting CT numbers of each pixel of a cross-sectional computed tomography image of the brain into Hounsfield unit (HU) values eliminating an artifact from the computed tomography image of which the CT numbers of each pixel have been converted into the HU values, and extracting the brain tissues and extracting a density distribution of the HU values from the computed tomography image, in which the artifact has been removed and the brain tissues have been extracted.
