Fig. 6From: Transforaminal endoscopic lumbar discectomy with two-segment foraminoplasty for the treatment of very highly migrated lumbar disc herniation: a retrospective analysisCalculation for the volume of pedicle and facet joint. (a): Image fusion of the pre- and post-operative 3-dimensional reconstructive vertebrae model; (b): The resection parts were obtained with Boolean operation; (c), (d): The model of resected pedicle (c) and SAP (d) were isolated, the volume was calculated; (e), (f): The preoperative pedicle (c) and SAP (d) were marked and obtained on Geomagic software; (g), (h): The model of the preoperative pedicle (g) and SAP (h) were obtained, the volume was calculatedBack to article page