側弯症せき柱の三次元形態モデリング

概要

論文の詳細を見る
Scoliosis is a spinal deformity that is defined as a pathological frontal curvature with decrease of the physiological sagittal curvature, and must be evaluated three-dimensionally. We present a morphologic curve to express the three-dimensional configuration of a scoliotic spine from two plane radiograms, and evaluate spinal curvature three-dimensionally. The morphologic curve can be formulated from two plane curves approximating the frontal and sagittal arrangements of the centers of vertebral bodies. Furthermore, the Cobb angle, which is widely used in orthopaedics, can be calculated three-dimensionally as the maximum angle between two tangent vectors of the morphologic curve. In 45 spines with idiopathic scoliosis, the configurations of spines were extremely well approximated by the morphologic curves. Three-dimensional Cobb angle was significantly larger than frontal Cobb angle. Since the three-dimensional Cobb angle includes the sagittal and frontal curvatures, it can be used for three-dimensional evaluation of the scoliotic spine.
一般社団法人日本機械学会の論文
1995-07-25