基于二维轮廓序列的膝关节三维重建

提出了一个基于二维轮廓序列的四面体网格生成方法,用于医学图像三维几何模型重构.该方法首先对各选定的断层图像提取目标轮廓并做分支匹配等处理,然后生成各轮廓内部平面域的三角网格,最后在相邻断层之间根据三角网格连接四面体单元.该方法被应用于人体膝关节虚拟手术系统的三维几何建模,得到的膝部股骨模型包含494个节点和2 046个四面体单元,膝部脂肪模型包含2 854个节点和14011个四面体单元,这些模型被成功地应用于膝关节手术仿真,从而证明了该三维模型重建方法的可行性和有效性.

3D reconstruction of knee joint based on 2D contour series

A tetrahedral mesh generating method based on 2D contour series was proposed to reconstruct 3D medical geometric models of genual tissues. Firstly, contours in the chosen slices were extracted and branch-matched. Secondly, planar domains bounded by these contours in slices were triangulated into 2D triangular meshes. Finally, 3D tetrahodral mesh was generated by forming a set of tetrahedrons between every two adjacent slices based on the corresponding triangular meshes. The proposed method was applied to 3D model reconstruction for the knee joint virtual surgery simulation system, and generated several 3D meshes. The generated model of the genual thighbone was a mesh with 494 nodes and 2046 tetrahedral elements, and the model of the genual fat tissue was a tetrahedral mesh with 2854 nodes and 14011 tetrahedrons. These 3D models were successfully used to simulate the knee joint surgery, which proves the feasibility and effectiveness of the proposed 3D model reconstruction method.