What is the primary reason for performing discography?

The primary reason for performing discography is to visualize the disc. Discography is a diagnostic procedure that involves the injection of a contrast material into the intervertebral disc under fluoroscopic guidance. This allows for the assessment of the disc's integrity and helps to identify any underlying abnormalities such as tears or herniation. By visualizing the contrast material within the disc space and surrounding tissues, the physician can evaluate pain response and determine whether the disc is the source of the patient’s symptoms.

While other options like rehabilitation, measuring disc height, or injecting medication may be related to disc issues, they are not the fundamental purpose of discography. Instead, discography focuses primarily on the visualization of the disc and the assessment of its condition, which is essential for guiding further treatment options.