Superior accuracy of model-based radiostereometric analysis for measurement of polyethylene wear: A phantom study.
Superior accuracy of model-based radiostereometric analysis for measurement of polyethylene wear: A phantom study.
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DOI：
10.1302/2046-3758.18.2000041
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发表时间：
2012-08
影响因子：
4.6
通讯作者：
Søballe K
中科院分区：
文献类型：
--
作者：
Stilling M;Kold S;de Raedt S;Andersen NT;Rahbek O;Søballe K
在评估聚乙烯（PE）磨损方面，假设基于模型的放射立体测量分析（RSA）的两种新方法的准确度和精密度上级普通X线片方法。构建体模器械以模拟三维（3D）PE磨损。连续获得每种模式的每个模拟佩戴位置的图像。评估了三种市售软件包：使用激光扫描杯模型的基于模型的RSA（MB-RSA）、使用计算机生成的基本几何形状模型的基于模型的RSA（EGS-RSA）和PolyWare。评估了二维（2D）和3D磨损测量的精密度（95%重复性限值）和准确度（均方根误差）。EGS-RSA、MB-RSA和PolyWare的2D磨损测量精度分别为0.078 mm、0.102 mm和0.076 mm。对于3D磨损测量，EGS-RSA、MB-RSA和PolyWare的精度分别为0.185 mm、0.189 mm和0.244 mm。当在2D和3D之间进行比较时，相同尺寸内所有方法的重复性相似（所有p > 0.28）。对于2D RSA方法，准确度低于0.055 mm，PolyWare至少为0.335 mm。对于3D测量，EGS-RSA、MB-RSA和PolyWare的准确度分别为0.1 mm、0.2 mm和0.3 mm。与RSA方法相比，PolyWare的准确度较低（p = 0.036）。RSA方法之间未观察到差异（p = 0.10）。对于所有方法，2D的精密度和准确度更好，RSA方法的准确度更上级。虽然不太准确和精确，但3D RSA定义了临床相关的磨损模式（多方向）。PolyWare是RSA的一个很好的低成本替代方案，尽管它不太准确，需要更大的样本量。
The accuracy and precision of two new methods of model-based radiostereometric analysis (RSA) were hypothesised to be superior to a plain radiograph method in the assessment of polyethylene (PE) wear. A phantom device was constructed to simulate three-dimensional (3D) PE wear. Images were obtained consecutively for each simulated wear position for each modality. Three commercially available packages were evaluated: model-based RSA using laser-scanned cup models (MB-RSA), model-based RSA using computer-generated elementary geometrical shape models (EGS-RSA), and PolyWare. Precision (95% repeatability limits) and accuracy (Root Mean Square Errors) for two-dimensional (2D) and 3D wear measurements were assessed. The precision for 2D wear measures was 0.078 mm, 0.102 mm, and 0.076 mm for EGS-RSA, MB-RSA, and PolyWare, respectively. For the 3D wear measures the precision was 0.185 mm, 0.189 mm, and 0.244 mm for EGS-RSA, MB-RSA, and PolyWare respectively. Repeatability was similar for all methods within the same dimension, when compared between 2D and 3D (all p > 0.28). For the 2D RSA methods, accuracy was below 0.055 mm and at least 0.335 mm for PolyWare. For 3D measurements, accuracy was 0.1 mm, 0.2 mm, and 0.3 mm for EGS-RSA, MB-RSA and PolyWare respectively. PolyWare was less accurate compared with RSA methods (p = 0.036). No difference was observed between the RSA methods (p = 0.10). For all methods, precision and accuracy were better in 2D, with RSA methods being superior in accuracy. Although less accurate and precise, 3D RSA defines the clinically relevant wear pattern (multidirectional). PolyWare is a good and low-cost alternative to RSA, despite being less accurate and requiring a larger sample size.
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影响因子：
3.7
作者：
Baad-Hansen, Thomas;Kold, Soren;Soballe, Kjeld
通讯作者：
Soballe, Kjeld
影响因子：
2.4
作者：
Börlin, N;Röhrl, SM;Bragdon, CR
通讯作者：
Bragdon, CR
DOI：
10.1080/00016470310017910
发表时间：
2003-10-01
期刊：
ACTA ORTHOPAEDICA SCANDINAVICA
影响因子：
--
作者：
Digas, G;Thanner, J;Kärrholm, J
通讯作者：
Kärrholm, J
DOI：
10.2106/00004623-200312000-00016
发表时间：
2003-12-01
影响因子：
5.3
作者：
Ebramzadeh, E;Sangiorgio, SN;Dorr, LD
通讯作者：
Dorr, LD
影响因子：
5
作者：
Ilchmann, Thomas;Lueem, Martin;Clauss, Martin
通讯作者：
Clauss, Martin