Article Figures & Data
Figures
- Fig 1.
A and B, The Lee system grade 2 and the Wildermuth system grade 2. T2-weighted images of a 39-year-old man and a 64-year-old man show narrowing of the vertical and transverse width of neural foramina in the left L5–S1 and the right L5–S1. Decreased intervertebral disk space, thickened ligamentum flavum, and disk protrusions are seen (arrows). Perineural fat obliteration is also seen, but nerve root deformity is not noted.
- Fig 2.
The Lee system grade 3 and the Wildermuth system grade 3. T1-weighted image of an 82-year-old woman revealing marked narrowing of the vertical and transverse width of neural foramina at L5–S1. Decreased intervertebral disk space, thickened ligamentum flavum, and disk protrusions are seen (arrows). The nerve root is collapsed and deformed compared with another nerve root at a different level.
- Fig 3.
The Lee system grade 0 and the Wildermuth system grade 1 foraminal stenosis. T2-weighted sagittal image of a 78-year-old woman shows a normal nerve root without compression but mild narrowing of the foramen in the right L4–5. The arrow indicates the protruded disk.
- Fig 4.
The Lee system grade 1 and the Wildermuth system grade 2. T1-weighted image of a 54-year-old man shows narrowing of the vertical width of the neural foramen and decreased intervertebral disk space in the left L5–S1 (arrows). Partial perineural fat obliteration is noted, but deformity of the nerve root is not seen.
Tables
Grade 0 Grade 1 Grade 2 Grade 3 Total Reader 1 56 19 8 8 91 Reader 2 65 12 8 6 91 Grade 0 Grade 1 Grade 2 Grade 3 Total Reader 1 50 16 18 7 91 Reader 2 60 8 18 3 91 Observer L System vs W System L System vs W System W System vs PNM Reader 1 0.888 0.751 0.800 Reader 2 0.885 0.751 0.680 -
Note:—L system indicates Lee system; W system, Wildermuth system.
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↵a The level of correlation significance was .01.
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Observer L System vs W System L System vs PNM W System vs PNM Reader 1 0.973 0.711 0.695 Reader 2 0.985 0.511 0.503 -
Note:—L system indicates Lee system; W system, Wildermuth system.
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↵a The level of correlation significance was .01.
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Observer L System vs W System L System vs PNM W System vs PNM Reader 1 0.832 0.612 0.742 Reader 2 0.841 0.530 0.637 -
Note:—L system indicates Lee system; W system, Wildermuth system.
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↵a The level of correlation significance was .01.
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