Factors that influence the results of indirect decompression employing oblique lumbar interbody fusion

Figure 1 Computed tomography image. A: Computed tomography scan in axial plane, contrast in HU provides differentiation of disc material, ligamentum flavum and spinal canal content including dura and epidural fat; B: Computed tomography image in axial plane taken at the level L4-L5, evidence of the absolute spinal stenosis with vertebral canal square 473 mm²; C: Postoperative computed tomography image in axial plane taken at the level L4-L5 demonstrate an increase in spinal canal square up to 92.4 mm².