Three-dimensional (3D) model reconstruction of fractured long bones is of great importance in the research of orthopedic surgery. A method is proposed to rapidly construct restored surface models of individual damaged femurs and tibias in this paper. Based on a cloud point set of individual fracture model, the developed methodology is processed as follows. First, typical feature points are defined and extracted in a pre-generated average model of intact bone according to prior medical knowledge. Next, an intact reference surface model is created based on a parameterization template with a few valid parameters measured from the damaged bone. Then, feature points of the fractured bone and corresponding ones of the reference are extracted, and the former is aligned to the latter by rigid registration. Finally, the major surface segments of fractured bone are atomically adjusted to each part of the reference with the obtained feature registration matrixes. Experimental results on femur and tibia show that the proposed method can reconstruct intact surface models of fractured bones efficiently and accurately with feature information extracted from individual long bones.

中文翻译：

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基于特征点的重建长骨骨折个体三维模型

骨折长骨的三维（3D）模型重建在整形外科研究中具有重要意义。本文提出了一种快速构建单个受损股骨和胫骨修复表面模型的方法。基于单个裂缝模型的浊点集，所开发的方法如下进行处理。首先，根据先前的医学知识，在预先生成的完整骨平均模型中定义并提取典型特征点。接下来，基于参数化模板创建完整的参考曲面模型，该模板具有从受损骨骼中测得的一些有效参数。然后，提取骨折骨的特征点和相应的参考点，并通过刚性配准将它们与后者对齐。最后，使用获得的特征配准矩阵将骨折的主表面片段原子调整到参考的每个部分。在股骨和胫骨上的实验结果表明，该方法可以利用从各个长骨中提取的特征信息，高效，准确地重建完整的骨折骨表面模型。