1. A non-transitory computer readable storage medium having a computer program stored thereon and representing a set of instructions that, when executed by a computer, causes the computer to: perform a segmentation on image data to identify a skeletal structure using a defined segmentation parameter; fill cavities on the identified skeletal structure in the image data, the cavities corresponding to bone marrow, a spinal cord, and a brain; detect a jaw-bone in the image data based on a ratio of bone to soft tissue; and remove the brain from the image data based on the detected jaw-bone.