Imaging knee position using MRI, RSA/CT and 3D digitisation
Imaging knee position using MRI, RSA/CT and 3D digitisation
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DOI：
10.1016/j.jbiomech.2004.02.007
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发表时间：
2005-02-01
影响因子：
2.4
通讯作者：
Martelli, S
中科院分区：
文献类型：
--
作者：
McPherson, A;Kärrholm, J;Martelli, S
本研究的目的是比较3种膝关节位置成像方法。3个新鲜尸体膝关节在0 °和120 °之间的6个屈曲角度下通过MRI、RSA和CT的组合以及3D数字化（在两个膝关节中）成像。所有42个职位的虚拟模型都是使用适当的计算机软件创建的。将每个虚拟模型与新定义的基于解剖学的笛卡尔坐标系对齐。使用刚体运动学直接从对齐的虚拟模型计算围绕3个坐标系轴的角旋转，发现3种方法同样准确。对于所有3种方法，可以使用基于解剖结构的图表描述每个膝关节的3次旋转。我们得出结论，3种数据采集方法在体外具有同等和足够的准确性。MRI可能是体内最有用的。(C)2004爱思唯尔有限公司保留所有权利。
The purpose of this study was to compare 3 methods of imaging knee position. Three fresh cadaver knees were imaged at 6 flexion angles between 0degrees and 120degrees by MRI, a combination of RSA and CT and 3D digitisation (in two knees). Virtual models of all 42 positions were created using suitable computer software. Each virtual model was aligned to a newly defined anatomically based Cartesian coordinate system. The angular rotations around the 3 coordinate system axes were calculated directly from the aligned virtual models using rigid body kinematics and found to be equally accurate for the 3 methods. The 3 rotations in each knee could be depicted using anatomy-based diagrams for all 3 methods. We conclude that the 3 methods of data acquisition are equally and adequately accurate in vitro. MRI may be the most useful in vivo. (C) 2004 Elsevier Ltd. All rights reserved.