1. A computer-implemented method for anatomically indexing a subject, comprising: receiving, by an image processor, image scan data representing a volume of a subject, the image scan data being comprised of a plurality of image slices of the subject and including at least a portion of a vertebral column of the subject, the vertebral column having a vertebral canal and comprised of a plurality of vertebral bodies; identifying, by the image processor, the vertebral canal of the vertebral column of the subject in the image scan data; determining, by the image processor, a plurality of markers for the vertebral column, each marker in the plurality of markers is indicative of a different vertebral body of the vertebral column and includes its location in the image scan data defined in a first coordinate system, such that the plurality of markers define a vertebral level coordinate system; and storing, by the image processor, each marker in the plurality of markers along with its location in a database, wherein the image processor is embodied as computer executable instructions executed by a computer processor.