Figure 1

Diagram showing the radiological indices of lateral whole-spine radiographs in the standing and decubitus positions. (A) The pelvic inclination angle was formed by the angle between a solid line connecting the promontorium and the upper edge of the symphysis pubis and a vertical line. (B) The pelvic angle was formed by the angle between a dotted line extending from the posterior side of the upper edge of the sacrum to the midpoint of a line connecting the central point of the left and right femoral heads and a vertical line. (C) The lumbar lordotic angle was formed by the angle between a dashed line extending from L1 to L5.