Discography is a diagnostic procedure used to determine one or more of your discs as the source of your back pain. Also known as a Discogram, Discography is used in cases where disabling pain is experienced by a patient who has already undergone a vast conservative treatment. First, a local anesthetic numbs the injection site. Then, a fluoroscope is used to place the needle to the edge of the disc (this can be repeated for one or more discs). Finally, the discs are injected with contrast dye one at a time to determine which are the diseased. Discussing the benefits and risks with your doctor is strongly encouraged; results vary on a case-to-case basis.