Reconstruction of Patient Specific Models of Femur for Surgery of Avascular Necrosis of Femoral Head
We developed a new reverse engineering based method for the reconstruction of patient specific models of femoral head for surgery of ANFH. Three dimensional models were reconstructed from the 3D CT dataset and approximated with 3D fitting algorithms based on reverse engineering. In this paper, a strategy of classifying femur from hip joint CT datasets based on Active Shape Model was introduced, a curvature based reduction method was applied to reduce the noise or redundancy points in the point cloud of femur and a surface reconstruction method from point cloud was analyzed too. In order to regain the spherical surface of collapsing femoral head, a fitting algorithm, which is the optimal least squares spherical approximation to a 3 D point cloud was used. Comparing the fitting models with their original shapes by overlapping them, we found that only part regions have little deviation. The results show that the fitting models and their original models are matching strictly.
Wei wei Song Bin Liu Zong ying Ou De wei Zhao Wei ming Wang Jun Han
Key Laboratory for Dalian University of Technology Precision & Non-traditional Machining of Ministry Key Laboratory for Dalian University of Technology Precision & Non-traditional Machining of Ministry Affiliated Zhongshan Hospital of Dalian University, Dalian, LiaoNing 116024 P. R. China Dalian Modern High-Tech Development Co., Lt, Dalian, LiaoNing 116024 P. R. China
国际会议
北京
英文
665-669
2007-05-23（万方平台首次上网日期，不代表论文的发表时间）