Three-dimensional reconstruction of femur based on Laplace operator and statistical shape model.
10.7507/1001-5515.202303024
- Author:
Zupei ZHANG
1
;
Xiaogang ZHANG
1
;
Yali ZHANG
1
;
Zhongmin JIN
1
Author Information
1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China.
- Publication Type:Journal Article
- Keywords:
Bone geometry;
Laplace operator;
Statistical shape model;
Three-dimensional reconstruction
- MeSH:
Imaging, Three-Dimensional/methods*;
Tomography, X-Ray Computed/methods*;
Femur/surgery*;
Models, Statistical;
Lower Extremity
- From:
Journal of Biomedical Engineering
2023;40(6):1168-1174
- CountryChina
- Language:Chinese
-
Abstract:
Reconstructing three-dimensional (3D) models from two-dimensional (2D) images is necessary for preoperative planning and the customization of joint prostheses. However, the traditional statistical modeling reconstruction shows a low accuracy due to limited 3D characteristics and information loss. In this study, we proposed a new method to reconstruct the 3D models of femoral images by combining a statistical shape model with Laplacian surface deformation, which greatly improved the accuracy of the reconstruction. In this method, a Laplace operator was introduced to represent the 3D model derived from the statistical shape model. By coordinate transformations in the Laplacian system, novel skeletal features were established and the model was accurately aligned with its 2D image. Finally, 50 femoral models were utilized to verify the effectiveness of this method. The results indicated that the precision of the method was improved by 16.8%-25.9% compared with the traditional statistical shape model reconstruction. Therefore, the method we proposed allows a more accurate 3D bone reconstruction, which facilitates the development of personalized prosthesis design, precise positioning, and quick biomechanical analysis.
