Spinal discography is an injection technique used to evaluate patients who have not responded to non-surgical treatments for their back pain. Usually a discogram is indicated when a variety of spinal diagnostic procedures have not pinpointed the origin of the pain. The spinal discogram, is designed to induce pain in a sensitive disc. Local anesthesia is applied and a needle is inserted into the center of each disc. A sterile liquid is then injected into each disc one at a time and you must report whether you feel pressure, pain or no pain. Pictures are taken with the fluoroscopic unit and a post-discogram CT is obtained to document the internal architecture of the disc.