Table 2 Sites of measurement, measurement points and radiologic definitions for lateral lumbar spinal stenosis
Imaging method | Author | Site of measurement | Level, where measured | Definition of stenosis (cut-off values) |
|---|---|---|---|---|
CT | Â | Lateral recess height | Â | Â |
|  | Ciric [39] |  | Not reported | 5 mm (normal) ≤ 3 mm (highly indicative) ≤ 2 mm (diagnostic) |
|  | Strojnik [16] |  | between the most medial point of the superior articular facet and the posterior point of the vertebral body | ≤ 3.6 mm |
| Â | Â | Depth of lateral recess | Â | Â |
| Â | Dincer [40] | Â | Between superior articular facet and the top part of the pedicle. | > 5 mm (normal) 4 - 5 mm (Group 3) 3 - 4 mm (Group 2) 2 - 3 mm (Group 1) |
|  | Mikhael [41] |  | Between the posterior surface of the vertebral body and the anteromedial portion of the superior articular facet at the level of the superior border of the corresponding level | > 5 mm (normal) 3 - 5 mm (suggestive) ≤ 3 mm (definitive) |
| Â | Â | Lateral recess angle | Â | Â |
|  | Strojnik [16] |  | Between the bottom and the roof of the triangular space (= lateral recess) | < 30° |