Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13018-024-04531-3/MediaObjects/13018_2024_4531_Fig1_HTML.jpg)
Measurement of coronal Cobb angle and height of intervertebral space on coronal X-ray of lumbar spine. The coronal Cobb angle (C-Cobb) refers to the angle between two straight lines perpendicular to A and B, A is the parallel line to the most inclined vertebral endplate at the head end, and B is the parallel line to the caudal most inclined vertebral endplate. The height of intervertebral space in coronal position (C-ISH) = (RH + MH + LH)/3, RH, MH and LH are the heights of right, middle and left intervertebral space, respectively