Figure 3.

Measurement of location of disc herniation was assessed on the axial cut. Zone 1 indicates a central herniation, zone 2 indicates a paracentral herniation, and zone 3 indicates a foraminal/extraforaminal disc herniation.

Measurement of location of disc herniation was assessed on the axial cut. Zone 1 indicates a central herniation, zone 2 indicates a paracentral herniation, and zone 3 indicates a foraminal/extraforaminal disc herniation.