Table 2 : Measures of the Inter-Pediculaire Diameter (IPD) of the lumbar spinal canal and the Transverse
Diameter (TD) of the lumbar dural sac, and the ratio of the TD on the IPD.


  LUMBAR  CANAL (IPD) DURAL SAC (TD) RATIO (R2)

  Min - Max Moyenne Min-Max Moyenne Min-Max Moyenne

L1 15-29.8 21.35±2.46 14.5-20.5 17.63±1.82 0.63-0.9 0.8±0.08
L2 16-31.6 21.72±2.46 15-18 16.6±1 0.65-0.95 0.84±0.03
L3 16-31.6 22.56±2.65 11.5-17.2 15.27±2.15 0.68-0.95 0.73±0.13
L4 11.9-35.9 24.01±3.47 10-17.4 14.24±2.22 0.37-0.73 0.58±0.1
L5 12-45.5 26.71±4.45 10-17 14.03±2.43 0.29-0.65 0.5±0.12
Moyenne générale 13.68±1.4 
-33.68±1.5
23.27±1.67 14.03-17.63 15.55±1.54 0.5-0.84 0.69±0.14

Amadou et al.Medical Imaging and Radiology  2017 5:3DOI : 10.7243/2054-1945-5-3