FIG 3. Sagittal T2-weighted image in a 29-year-old woman with chronic back pain. Intervertebral disks at L4–L5 and L5–S1 have diminished height, diminished signal intensity, and bulging of the posterior anulus fibrosus. No herniations are evident. Diskography subsequently showed concordant pain at the L4–L5 level only. The rotations were 0.3° at L1–L2, 1.3° at L2–L3, -0.1° at L3–L4, 2.2° at L4–L5, and 1.9° at L5–S1.