The deformity plane determination and shape approximation of long bones from bi-planar radiographic

A new procedure to determine the deformity plane for long bone from bi-planar radiographic and to approximate its shape on that plane is developed. This procedure can be used for the preoperative planning of angular deformity correction of long bones, especially the tibia or femur. The bone outline obtained in this procedure is used for the authors' Preoperative Planning System for angular deformity correction planning. By using this procedure, the third radiographic on the actual deformity plane can be omitted.