Fig. 2. (A ) Anteroposterior radioscopic view of the lumbar spine with the patient in the prone position. The x-ray module is positioned in a posterior-anterior position. Needle position under the L3 pedicle is visualized; 0.5 ml dye (180 mg iodine per ml iohexol, Omnipaque®) is injected through the needle, resulting in a clear discogram of the L3–L4 intervertebral disc (the right side of the figure is the right side of the patient). (B ) Lateral radioscopic view with the patient in the prone position, showing descending dye from the tip of the needle in the neuroforamen to the intervertebral disc, beside the discogram.