An automated method for defining anatomic coordinate systems in the hindfoot.
An automated method for defining anatomic coordinate systems in the hindfoot.
复制标题
DOI：
10.1016/j.jbiomech.2020.109951
复制
发表时间：
2020-08-26
影响因子：
2.4
通讯作者：
Anderst W
中科院分区：
文献类型：
--
作者：
Brown JA;Gale T;Anderst W
缺乏一个标准化的方法来定义后足骨坐标系，使得很难比较运动学结果从不同的研究。本研究的目的是开发一种可靠和稳健的程序，用于定义距骨和跟骨的解剖坐标系。根据受试者之间的解剖学一致性、可重复性及其与功能旋转轴的对应性，对四种方法进行了评价。这四个系统包括：1）交互式识别的骨骼界标，2）主成分分析，3）自动识别的骨骼界标，以及4）将胫骨坐标系转换到后足骨骼。对40根距骨和40根跟骨对这四种系统进行了评估。使用动态双平面X线摄影确定步态中后足的功能旋转轴。系统2和3是最可重复和一致的，因为在定义坐标系时缺乏操作员干预。没有一个坐标系与步态中的功能旋转轴相对应。推荐使用系统3而不是系统2，因为它更接近临床测量的既定骨角，尤其是跟骨。本研究提出了一种用于定义距骨和跟骨解剖坐标系的自动化方法，该方法不依赖于手动放置标记或将球体拟合到骨表面，由于操作者依赖性测量，这些方法不太可靠。使用这种自动化的方法将更容易比较研究中的后足运动学结果。
The absence of a standardized method for defining hindfoot bone coordinate systems makes it difficult to compare kinematics results from different research studies. The purpose of this study was to develop a reliable and robust procedure for defining anatomical coordinate systems for the talus and calcaneus. Four methods were evaluated based upon their anatomic consistency across subjects, repeatability, and their correspondence to functional axes of rotation. The four systems consisted of: 1) interactively identified bony landmarks, 2) a principal component analysis, 3) automatically identified bony landmarks, and 4) translating the tibial coordinate system to the hindfoot bones. The four systems were evaluated on 40 tali and 40 calcanei. The functional axes of rotation were determined using dynamic biplane radiography to image the hindfoot during gait. Systems 2 and 3 were the most repeatable and consistent due to the lack of operator intervention when defining coordinate systems. None of the coordinate systems corresponded well to functional axes of rotation during gait. System 3 is recommended over System 2 because it more closely mimics established bone angles measured clinically, especially for the calcaneus. This study presents an automated method for defining anatomic coordinate systems in the talus and calcaneus that does not rely on manual placement of markers or fitting of spheres to the bone surfaces which are less reliable due to operator-dependent measurements. Using this automated method will make it easier to compare hindfoot kinematics results across research studies.
登录
查看更多内容
影响因子：
2.4
作者：
Peltz, Cathryn D.;Haladik, Jeffrey A.;Bey, Michael J.
通讯作者：
Bey, Michael J.
影响因子：
2.9
作者：
Gutekunst DJ;Liu L;Ju T;Prior FW;Sinacore DR
通讯作者：
Sinacore DR
影响因子：
2.7
作者：
Arndt, A;Westblad, P;Lundberg, A
通讯作者：
Lundberg, A
影响因子：
2.9
作者：
Sheehan, Frances T.
通讯作者：
Sheehan, Frances T.
影响因子：
2.8
作者：
de Asla, RJ;Wan, L;Li, G
通讯作者：
Li, G