Table 1 Modified Dallas discogram scale
Grade | Morphology of CT discograms |
|---|---|
0 | Normal disc |
1 | Radial fissure involving the middle third of the annulus |
2 | Radial fissure extending to the middle third of the annulus |
3 | Radial fissure extending to the outer third of the annulus but involving < 30° of the disc circumference |
4 | Radial fissure extending to the outer third of the annulus and involving > 30° of the disc circumference |