A volumetric model-based 2D to 3D registration method for measuring kinematics of natural knees with single-plane fluoroscopy
A volumetric model-based 2D to 3D registration method for measuring kinematics of natural knees with single-plane fluoroscopy
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DOI：
10.1118/1.3301596
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发表时间：
2010-03-01
期刊：
影响因子：
3.8
通讯作者：
Hsu, Horng-Chaung
中科院分区：
文献类型：
--
作者：
Tsai, Tsung-Yuan;Lu, Tung-Wu;Hsu, Horng-Chaung
方法：WEMS方法优先匹配数字化重建的X线片和透视图像的较长边缘。结果：WEMS方法的平面内平移精度小于0.77 mm，平面外平移精度小于3.06 mm，所有旋转精度均小于1.13度，优于PI和GD方法。结论：建立了一种基于体积模型的二维到三维配准方法，可用于单面透视下膝关节活体运动的三维测量。在本研究中使用的设备，WEMS方法的精度被认为是可以接受的，在临床应用中测量自然膝关节的三维运动学。
Methods: The WEMS method gives higher priority to matching of longer edges of the digitally reconstructed radiograph and fluoroscopic images. The measurement errors of the methods were evaluated based on a human cadaveric knee at 11 flexion positions.Results: The accuracy of the WEMS method was determined experimentally to be less than 0.77 mm for the in-plane translations, 3.06 mm for out-of-plane translation, and 1.13 degrees for all rotations, which is better than that of the PI and GD methods.Conclusions: A new volumetric model-based 2D to 3D registration method has been developed for measuring 3D in vivo kinematics of natural knee joints with single-plane fluoroscopy. With the equipment used in the current study, the accuracy of the WEMS method is considered acceptable for the measurement of the 3D kinematics of the natural knee in clinical applications.