Fig. 3From: Clinical, Radiographic and Fusion Comparison of Oblique Lumbar Interbody Fusion (OLIF) stand-alone and OLIF with posterior pedicle screw fixation in patients with degenerative spondylolisthesisLength parameters measured on lateral X-rays (A). Disc height= (AH + PH)/2; foraminal height = FH; Anterior spondylolisthesis distance = ASD. Angle parameters measured on lateral X-rays (B). Segmental lordotic angle = FSA; lumbar lordotic angle = LA.Back to article page