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Surface modelling of trunk deformity

Abstrud-A surface modelling system has been developed for portraying trunk deformity in children with abnormal spinal curvature. McLain's triangulation algorithm was modified to reduce the boundary effect. Combined with internal spinal alignment information obtained from radiographs, the 3-D surface can be used to improve the understanding of the effects of treatment on the natural history of spinal deformity io cbildren.