Fig. 1From: Finite element mechanical analysis of ipsilateral approach and contralateral approach in unilateral bilateral endoscopic spine surgeryPreoperative and postoperative MRI and intraoperative images of the patient. a Preoperative magnetic resonance axial image of the patient showing a herniated lumbar disc compressing the dural sac. b Postoperative magnetic resonance axial image of the patient showing the patient’s occluded bone. c Intraoperative endoscopic surveillance of the occluded boneBack to article page