Figure 1: Spine radiographs of scoliosis patients. (a-d) Cobb angle measurements. (a) Posteroanterior radiograph with proximal thoracic (white lines), main thoracic (red lines), and thoracolumbar curves (yellow lines) measured. (b) Left-side bending radiograph showing proximal thoracic (white lines) and thoracolumbar flexibility (black lines). (c) Right-side bending radiograph showing main thoracic curve flexibility. (d) Lateral spine radiograph showing thoracic kyphosis measured from T5 to T12