Ylikoski M, Tallroth K
Department of Radiology, Orthopaedic Hospital of the Invalid Foundation, Helsinki, Finland.
J Spinal Disord. 1990 Dec;3(4):387-91.
Thirty consecutive posteroanterior and lateral radiographs of patients with adolescent idiopathic scoliosis with a mean Cobb angle of 24.4 degrees were read. In measuring the scoliotic angle, the interobserver error (SD) was 2.8 degrees and the intraobserver, 1.8 degrees. Rotation of the apical vertebra was estimated by measuring the translation of the pedicle on posteroanterior radiographs. For vertebral rotation, the interobserver measurement error (SD) was 3.4 and the intraobserver, 1.8%. The height of the apical vertebral body and the intervertebral disc space next inferior to it were measured on lateral radiographs as the anterior angles of the diagonals of the respective body or disc space. In measuring the vertebral body height, the interobserver error (SD) was 3.2 and the intraobserver, 2.6 degrees, and in measuring the intervertebral disc space height, the interobserver error was 2.4 and the intraobserver, 1.8 degrees. The angles can be transformed to a corresponding height/length ratio by a simple trigonometrical formula.
对30例青少年特发性脊柱侧凸患者的后前位和侧位X线片进行了连续观察，这些患者的平均Cobb角为24.4度。在测量脊柱侧凸角度时，观察者间误差（标准差）为2.8度，观察者内误差为1.8度。通过测量后前位X线片上椎弓根的移位来估计顶椎的旋转。对于椎体旋转，观察者间测量误差（标准差）为3.4，观察者内误差为1.8%。在侧位X线片上测量顶椎椎体及其下方相邻椎间盘间隙的高度，作为相应椎体或椎间盘间隙对角线的前角。在测量椎体高度时，观察者间误差（标准差）为3.2，观察者内误差为2.6度；在测量椎间盘间隙高度时，观察者间误差为2.4，观察者内误差为1.8度。这些角度可以通过一个简单的三角公式转换为相应的高度/长度比。
