Fig. 2
From: Gravity-induced coronal plane joint moments in adolescent idiopathic scoliosis
Constructions to calculate segmental moments: a using ImageJ polygon tool to trace the outline of a disc space for calculation of the disc’s coronal centroid for the joint’s ICR location (blue dot); b coronal reformatted image of the entire thoracic and lumbar spine with overlaid plot of the torso segment weight vectors (indicated by red arrows), the estimated head and upper limb weight vectors (pink arrows) and the ICRs located at the centroids of the IVDs (blue dots)