The value of the axial view in assessing discograms. An experimental study with cadavers

The clinical value of discography is controversial. An axial view of a discogram such as could be obtained with CT scans should increase the structural information regarding disc pathology, and clarify the relationship to disease of the facet joints as well. To evaluate this concept, 103 intervertebral levels in 23 cadaver specimens were studied by anteroposterior, lateral, and axial roentgenographic views. From these three views, a new classification for interpreting discograms was developed. The correlations between the three different views were good, confirming the potential value of CT axial views. However, in one fourth of the discs there were pathologic anatomic findings that could be seen only in the axial views. There were more severe osteoarthritic changes in the right than the left facet joint, and a discrepancy between facet arthritis and disc disease was also noted.