Lumbar Canal Diameter Evaluation by CT Morphometry—Study of Indian Population

A: Spinal canal diameter/midsagittal diameter—(A–B) Distance between posterior border of the vertebrae to the lamina at the midline. Spinal canal width (interpedicular distance) (C–D) Maximum distance between pedicle. B: Lateral recess diameter—(E–F) The distance between the posterior aspect of the vertebral body and anteromedial point of facet joints. C: Vertebral depth—(G–H) Distance between anterior and posterior end of vertebral body in the plane of the upper and lower end plate respectively. Vertebral width—(I–J) Distance between the lateral border of the vertebral body in the plane of the upper and lower end plate respectively. D: Interfacet distance—(K–L) Distance between the anteromedial points of the facet joint.