Soft tissue artifact causes underestimation of hip joint kinematics and kinetics in a rigid-body musculoskeletal model
Soft tissue artifact causes underestimation of hip joint kinematics and kinetics in a rigid-body musculoskeletal model
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DOI：
10.1016/j.jbiomech.2020.109890
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发表时间：
2020-07-17
影响因子：
2.4
通讯作者：
Anderson, Andrew E.
中科院分区：
文献类型：
--
作者：
Fiorentino, Niccolo M.;Atkins, Penny R.;Anderson, Andrew E.
刚体肌肉骨骼模型已被应用于研究髋关节的运动学，力矩，肌肉力和关节反作用力。大多数情况下，模型是由通过光学跟踪粘附在皮肤上的标记计算的片段运动驱动的。光学跟踪的一个限制是软组织伪影（STA），其由于皮肤表面相对于底层骨骼的运动而发生。本研究的目的是量化肌肉骨骼模型输出的差异时，跟踪身体部分的位置与皮肤标记相比，通过直接成像的骨运动与双荧光透视（DF）测量的骨标志。11名髋关节解剖发育正常的无症状受试者在水平跑步机上以自选速度行走时进行DF成像。采用逆运动学、逆动力学、静力学优化和关节反力分析等方法，生成髋关节运动学和动力学。通过比较基于皮肤标记位置（SM）的模拟估计值与DF骨标志上的虚拟标记的差异，评估STA的影响。虽然模式相似，但STA导致低估了髋关节的运动学、活动度（ROM）、力矩和反作用力，包括屈曲-伸展ROM、最大内旋关节力矩和峰值关节反作用力大小。尽管如此，动力学差异相对较小，因此可能不相关，也不具有临床意义。(C)2020爱思唯尔有限公司版权所有。
Rigid body musculoskeletal models have been applied to study kinematics, moments, muscle forces, and joint reaction forces in the hip. Most often, models are driven with segment motions calculated through optical tracking of markers adhered to the skin. One limitation of optical tracking is soft tissue artifact (STA), which occurs due to motion of the skin surface relative to the underlying skeleton. The purpose of this study was to quantify differences in musculoskeletal model outputs when tracking body segment positions with skin markers as compared to bony landmarks measured by direct imaging of bone motion with dual fluoroscopy (DF). Eleven asymptomatic participants with normally developed hip anatomy were imaged with DF during level treadmill walking at a self-selected speed. Hip joint kinematics and kinetics were generated using inverse kinematics, inverse dynamics, static optimization and joint reaction force analysis. The effect of STA was assessed by comparing the difference in estimates from simulations based on skin marker positions (SM) versus virtual markers on bony landmarks from DF. While patterns were similar, STA caused underestimation of kinematics, range of motion (ROM), moments, and reaction forces at the hip, including flexion-extension ROM, maximum internal rotation joint moment and peak joint reaction force magnitude. Still, kinetic differences were relatively small, and thus they may not be relevant nor clinically meaningful. (C) 2020 Elsevier Ltd. All rights reserved.