Kanayama M, Tadano S, Kaneda K, Ukai T, Abumi K
Department of Orthopaedic Surgery, Hokkaido University School of Medicine, Japan.
J Biomech Eng. 1996 May;118(2):247-52. doi: 10.1115/1.2795967.
Three-dimensional configuration of the scoliotic spine was mathematically expressed by a spatial curve passing through each vertebral centroid ("vertebral body line"). Three-dimensional location of the vertebral centroid was determined from digitization on the frontal and sagittal roentgenograms. Cobb angle, which is clinically used for measuring scoliosis curvature, was calculated in space to evaluate scoliosis deformity three-dimensionally. In forty-five scoliotic spines, regardless of curvature and curve patterns, the spinal configurations were excellently approximated by vertebral body lines. Vertebral body lines swerved from the sagittal plane at the end vertebrae, but aligned on a certain plane within the scoliosis region. Three-dimensional Cobb angle, which was larger than that in the frontal plane, can be utilized to evaluate the scoliosis deformity.
通过穿过每个椎体中心（“椎体线”）的空间曲线，以数学方式表达脊柱侧弯的三维形态。椎体中心的三维位置通过正位和侧位X线片数字化来确定。临床上用于测量脊柱侧弯弯曲度的Cobb角在空间中进行计算，以三维方式评估脊柱侧弯畸形。在45个脊柱侧弯的脊柱中，无论其弯曲度和曲线模式如何，脊柱形态都能通过椎体线得到很好的近似。椎体线在终椎处偏离矢状面，但在脊柱侧弯区域内位于某一平面上。大于正位平面的三维Cobb角可用于评估脊柱侧弯畸形。
