Zhang Zhiwei, Chen Zhenxian, Zhang Zhifeng, Wang Caimei, Jin Zhongmin
International Machinery Center, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
School of Mechanical Engineering, Chang'an University, Xi'an 710064, P. R. China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2022 Oct 25;39(5):862-869. doi: 10.7507/1001-5515.202111005.
The geometric bone model of patients is an important basis for individualized biomechanical modeling and analysis, formulation of surgical planning, design of surgical guide plate, and customization of artificial joint. In this study, a rapid three-dimensional (3D) reconstruction method based on statistical shape model was proposed for femur. Combined with the patient plain X-ray film data, rapid 3D modeling of individualized patient femur geometry was realized. The average error of 3D reconstruction was 1.597-1.842 mm, and the root mean square error was 1.453-2.341 mm. The average errors of femoral head diameter, cervical shaft angle, offset distance and anteversion angle of the reconstructed model were 0.597 mm, 1.163°, 1.389 mm and 1.354°, respectively. Compared with traditional modeling methods, the new method could achieve rapid 3D reconstruction of femur more accurately in a shorter time. This paper provides a new technology for rapid 3D modeling of bone geometry, which is helpful to promote rapid biomechanical analysis for patients, and provides a new idea for the selection of orthopedic implants and the rapid research and development of customized implants.
患者的骨骼几何模型是个体化生物力学建模与分析、手术规划制定、手术导板设计以及人工关节定制的重要基础。在本研究中，提出了一种基于统计形状模型的股骨快速三维（3D）重建方法。结合患者的X线平片数据，实现了个体化患者股骨几何形状的快速3D建模。3D重建的平均误差为1.597 - 1.842毫米，均方根误差为1.453 - 2.341毫米。重建模型的股骨头直径、颈干角、偏移距离和前倾角的平均误差分别为0.597毫米、1.163°、1.389毫米和1.354°。与传统建模方法相比，新方法能够在更短的时间内更准确地实现股骨的快速3D重建。本文为骨骼几何形状的快速3D建模提供了一项新技术，有助于推动对患者的快速生物力学分析，并为骨科植入物的选择以及定制植入物的快速研发提供了新思路。
