An imaging procedure which reveals the inner structure and condition of an intervertebral disc by injecting dye through a needle placed into the disc. A CT Scan is then performed to image the disc more precisely. Discography can also be used to determine if the disc is a source of pain, in addition to revealing the disc’s inner structure. Discography is often employed to determine a patient’s suitability for fusion surgery in the neck, mid back, or low back. But more recent medical studies have recommended against its use because the inserting of the needle into the good disk is thought to cause degeneration of that disc overtime.