Fig. 3

Improvement obtained by infiltration and radiomorphometric measurements described as scatterplots: posterior disc height [21] (a), neuroforaminal width [22] (b), cross-sectional area of the neuroforamen [23] (c), ligamentous interfacet distance [26] (d), cross-sectional area of the spinal canal (e) and sagittal spinal canal diameter [26, 55,56,57] (f). No relevant correlation could be observed. CSA cross-sectional area, lig. ligamentous, sag. sagittal