Supplement Figure 4



Supplement Figure 4. The central lumbar canal spinal stenosis of L3–4 in a male (right).

Preoperative CT and MRI showed severe stenosis of L3-4 (A, C, E).

Postoperative CT and MRI showed that L3–4 vertebral canal volume was expanded (B, D, F). Arrow shows the decompression.

CT image reconstruction indicated a range of decompression at the L3–4 lamina, removal of the upper third of the facet joint, removal of partial lamina, and retaining of 2/3 part of the facet joint (G, H). Arrow shows the decompression.

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