Kim YM, et al. - In a retrospective review of the plain radiographs and CT scans of 90 patients with thoracolumbar fractures (fracture group), experts investigated the factors that contributed to the difference in the SSA between plain radiography and CT, as well as their threshold values. More kyphosis was indicated with mean SSA determined on lateral decubitus plain radiographs. A significant discrepancy between the two imaging modalities could be seen when the SSA on plain radiography is more than 17°. Findings suggested this discrepancy to be mainly attributable to the difference in patient positioning (lateral decubitus position for plain radiography vs supine position for CT imaging).