Fig. 2From: Isobar hybrid dynamic stabilization with posterolateral fusion in mild and moderate lumbar degenerative diseaseImaging measurement methods (The range of motion (ROM) of the surgical segment and the adjacent segment is assessed by measured Cobb angle (α) of the surgical segment and adjacent segments on dynamic lateral radiographs. The lumbar lordosis angle (LL) was measured by a standing lateral radiograph. The Cobb angle between upper endplate of L1 and S1 was defined LLBack to article page