Reliability of a markerless motion capture system to measure the trunk, hip and knee angle during walking on a flatland and a treadmill
Reliability of a markerless motion capture system to measure the trunk, hip and knee angle during walking on a flatland and a treadmill
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DOI：
10.1016/j.jbiomech.2020.109929
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发表时间：
2020-08-26
影响因子：
2.4
通讯作者：
Kawanishi, Hiromichi
中科院分区：
文献类型：
--
作者：
Tamura, Hiroyuki;Tanaka, Ryo;Kawanishi, Hiromichi
背景：使用 Microsoft Kinect 等红外传感器的无标记运动捕捉系统 (MLS) 已用于步态分析。多项研究表明，通过 MLS 测量步行过程中躯干和下肢关节角度的运动学测量是有效的。然而，在使用 MLS 和 Kinect v2 行走时，运动学测量的再现性、系统误差的存在或随机误差程度尚未得到证实。本研究旨在确认步态期间使用 Kinect v2 进行运动学测量的可靠性。二十二名没有受伤的年轻人自愿参加。在平地和跑步机上均以 2 英里/小时 (mph) 的速度行走。计算类内相关系数（ICC），识别系统误差，并估计最小可检测变化（MDC），以评估步行期间躯干、髋关节和膝关节角度运动学测量的可靠性。平地测量的躯干角度，ICC高于0.6，系统误差较小，MDC比跑步机步态（6.6度）小2.2度。在平地上测量的髋关节角度，虽然系统误差很小，但ICC并不高于跑步机，MDC超过5度。膝关节的结果与髋关节的结果相似。 Kinect 在平地上慢步行走时比在跑步机上更容易检测躯干的运动异常。 (C) 2020 作者。由爱思唯尔有限公司出版
Background: Markerless motion capture system (MLS) using an infrared sensor such as Microsoft Kinect has been used for gait analysis. Several studies have shown that kinematic measurements of trunk and lower limb joint angles during walking measured by MLS are valid. However, the reproducibility, presence of systematic error, or degree of random error of kinematic measurements during walking using MLS with Kinect v2 were not demonstrated. This study was made to confirm the reliability of kinematic measurements using Kinect v2 during gait. Twenty-two young, injury-free individuals volunteered to participate. Walks were made at 2 miles per hour (mph) on both the flatland and the treadmill. Intra-class correlation coefficients (ICCs) were calculated, systematic errors identified, and minimal detectable changes (MDCs) were estimated to assess the reliability of kinematic measurements of trunk, hip, and knee joint angles during walking. For trunk angles measured on the flatland, ICC was higher than 0.6, systematic error was smaller, and MDC was 2.2 degrees smaller than that in gait on the treadmill (6.6 degrees). In hip joint angles measured on the flatland, although systematic error was slight, ICC was not higher than on the treadmill and MDC exceeded 5 degrees. The results for the knee joint were similar to those of the hip joint. Kinect can detect kinematic abnormalities of the trunk during slow walking on the flatland easier than on the treadmill. (C) 2020 The Authors. Published by Elsevier Ltd.