Fig. 12
From: Idiopathic scoliosis in children and adolescents: assessment with a biplanar X-ray device
Axial vertebral rotation assessed by the Nash-Moe method. This 2D method uses the position of pedicles as reference landmarks. The half vertebra on the side of convexity is divided into three segments. If there is no axial vertebral rotation (grade 0), the pedicle is seen within the outer segment. As the degree of axial vertebral rotation increases (grades 1–4), the convex-side pedicle migrates towards the side of concavity