Fig. 2

Measured spine parameters. The left picture shows the line of the superior endplate of the upper vertebra of the scoliotic curve and the line of the inferior end plate of the lower vertebra of the curve; the complementary angle of these lines is the Cobb angle The right picture shows the sagittal parameters. The kyphosis and lordosis parameters are defined as the angle between the superior endplate of the upper vertebra and inferior endplate surface of the lower vertebra