A discogram, or discography, is a minimally invasive diagnostic imaging test that helps determine whether a specific intervertebral disc may be the source of back pain. When discs bulge or rupture, they may press on the nerves of the cervical or spinal column and cause pain or weakness. In a discogram, a contrast material is injected into the center of one or more spinal discs using x-ray guidance. This injection may temporarily reproduce the patient’s back pain symptoms. As part of the procedure, an x-ray or CT scan also may be performed to obtain pictures of the disc.