Radiologic investigation of normal and abnormal structures and conditions found in the skeletal system have yielded valuable information to the veterinary profession. The relatively great densities demonstrated by skeletal tissues and the alterations in those densities brought about by disease processes have aided in interpretation of abnormalities. They were readily observable on the film, and the techniques for producing diagnostic films, although rigid, were relatively easy of achievement. Recently, in both human and veterinary radiology, efforts at achieving the same wide use of the science of radiology have been pointed toward demonstration and interpretation of lesions which occur in the non-osseous portions of the body.