A new method for estimating three-dimensional movement of the patella using a surface mapping method and computed tomography
A new method for estimating three-dimensional movement of the patella using a surface mapping method and computed tomography
复制标题
使用表面映射方法和计算机断层扫描估计髌骨三维运动的新方法
DOI：
10.1016/j.heliyon.2020.e04729
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发表时间：
2020
期刊：
影响因子：
4
通讯作者：
Edama M
中科院分区：
文献类型：
--
作者：
Inai T;Takabayashi T;Watanabe S;Ikezu M;Kaneko F;Matsuzawa K;Edama M
前言以前的一项研究报告了一种称为2D-3D配准技术的方法来检查髌骨的三维运动。然而，该方法需要双平面荧光透视系统。在本研究中，目的是建立一种新的方法（基于CT的表面映射方法），以估计三维位置和角度的髌骨与运动捕捉系统和CT。方法在研究1中，最合适的参数，基于CT的表面映射方法（即，目标边缘长度、软组织厚度的阈值和标记之间的最小距离）被探索和确定。在研究2中，三维运动（即，结果研究1的结果表明：（1）靶边缘长度为3 mm，（2）软组织厚度阈值为0 - 20 mm，（3）软组织厚度阈值为0 - 20 mm，（4）软组织厚度阈值为0 - 20 mm，（5）软组织厚度阈值为0-20 mm，（6）软组织厚度阈值为0-20 mm，（7）软组织厚度阈值为0-20 mm。（3）最小标记间距10 mm。研究2的结果表明，位置和角度误差最大不超过10 mm和10°，分别结论基于CT的表面映射方法可能有助于未来的研究，以澄清三种不同的位置，髌腱炎患者和健康受试者之间髌骨的三维运动。
IntroductionA previous study reported a method called the 2D-3D registration technique to examine three-dimensional movement of the patella. However, that method requires a biplane fluoroscopy system. In the present study, the aim was to establish a new method (CT-based surface mapping method) to estimate three-dimensional positions and angles of the patella with a motion capture system and CT.MethodsIn Study 1, the most appropriate parameters for the CT-based surface mapping method (i.e., target edge length, threshold of thickness of the soft tissue, and minimum distance between markers) were explored and determined. In Study 2, three-dimensional movement (i.e., positions and angles) of the patella using the CT-based surface mapping method and the most appropriate parameters were determined, and they were compared with the true positions and angles obtained by CT.ResultsThe results of Study 1 showed that the most appropriate conditions were as follows: (1) target edge length, 3 mm; (2) threshold of thickness of the soft tissue, 0–20 mm; and (3) minimum distance between markers, 10 mm. The results of Study 2 showed that the errors of the positions and angles were less than approximately 10 mm and 10° at most, respectively (both supine and sitting positions).ConclusionThe CT-based surface mapping method may be useful for a future study to clarify differences in three-dimensional movements of the patella between patients with patellar tendinitis and healthy subjects.