Fig. 2From: Successful annuloplasty using the cone-beam computed tomography-assisted radiofrequency thermocoagulation system in a patient with severe vertebral deformity: a case reportPreoperative image evaluation. a Sagittal, axial, and reconstructed 3-dimensional computed tomography images show the left L5/S1 abnormal facet complex and unco-ossified S1 lamina (red arrows). b Sagittal and axial T2-weighted magnetic resonance imaging show the L5/S1 degenerative disc compressing the existing left S1 nerve. c Axial computed tomography discography shows the morphologically violated disc at L5/S1. The contrast medium enters the posterior annulusBack to article page