Fig. 2From: Percutaneous endoscopic unilateral laminotomy and bilateral decompression under 3D real-time image-guided navigation for spinal stenosis in degenerative lumbar kyphoscoliosis patients: an innovative preliminary studya Preoperative sagittal section of T2WI MRI shows severe stenosis over L4-L5. b Postoperative sagittal section of T2WI MRI shows stenosis being relieved with intact posterior elements. The decompression level (White line) on axial section of T2WI MRI is shown in (c) and (d). Comparing c preoperative and d postoperative T2WI axial section MRI, dura sac cross-sectional area (DSCSA) increases significantly after endoscopic laminotomy at L4–5 under O-arm navigation (1) without any facet joints damage, via (2) interlaminar approachBack to article page