This is a lateral (side view) MRI scan showing a patient lying face down with 8-9 mm herniated lumbar disc at L4 L5

This is an axial (top view) MRI scan showing the same patient with an 8-9 mm disc herniation at L4 L5

Discogram on another patient showing normal disc and abnormal disc with leakage of isoview dye at L3 L4 and degenerated disc at L5 S1