Evaluation of the Microsoft Kinect as a clinical assessment tool of body sway
Evaluation of the Microsoft Kinect as a clinical assessment tool of body sway
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DOI：
10.1016/j.gaitpost.2014.06.012
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发表时间：
2014-09-01
期刊：
影响因子：
2.4
通讯作者：
Tong, Kai-Yu
中科院分区：
文献类型：
--
作者：
Yeung, L. F.;Cheng, Kenneth C.;Tong, Kai-Yu
总体质心（TBCM）是测量人体摇摆的一种有用的运动学测量方法。然而，昂贵的设备和高技术要求限制了运动捕捉系统在大规模临床环境中的应用。由测力板测得的压力中心（CP）不能准确地反映大的身体摇摆运动时的TBCM。微软Kinect是一种快速发展的、廉价的、便携式的姿势测量设备，它提供了TBCM摇摆的客观和定量测量。本研究的目的是评估Kinect作为TBCM摇摆测量的临床评估工具。将Kinect系统的性能与Vicon动作捕捉系统和测力板进行了比较。10名健康男性受试者进行四项直立安静站立任务：(1)睁眼（EOn）、(2)闭眼（ECn）、(3)睁眼站在泡沫上（EOf）和(4)闭眼站在泡沫上（ECf）。我们的研究结果显示，Kinect系统产生了高度相关的TBCM摆动测量（在Kinect-Vicon比较中，平均RMSE = 4.38 mm；平均CORR = 0.94），以及与Vicon相当的会话内可靠性。然而，Kinect总是将95%的倾斜度高估了约3毫米。这种偏移可能是由于Kinect传感器有限的精度、分辨率和灵敏度。Kinect设备在中外侧方向比前后方向更准确，并且在更具挑战性的平衡任务中比力板表现更好，例如（ECf）具有较大的TBCM摆动。总的来说，Kinect是一种具有成本效益的替代运动捕捉和力板系统，用于TBCM摇摆的临床评估。(C) 2014 Elsevier b.v.版权所有
Total body center of mass (TBCM) is a useful kinematic measurement of body sway. However, expensive equipment and high technical requirement limit the use of motion capture systems in large-scale clinical settings. Center of pressure (CP) measurement obtained from force plates cannot accurately represent TBCM during large body sway movement. Microsoft Kinect is a rapidly developing, inexpensive, and portable posturographic device, which provides objective and quantitative measurement of TBCM sway. The purpose of this study was to evaluate Kinect as a clinical assessment tool for TBCM sway measurement. The performance of the Kinect system was compared with a Vicon motion capture system and a force plate. Ten healthy male subjects performed four upright quiet standing tasks: (1) eyes open (EOn), (2) eyes closed (ECn), (3) eyes open standing on foam (EOf), and (4) eyes closed standing on foam (ECf). Our results revealed that the Kinect system produced highly correlated measurement of TBCM sway (mean RMSE = 4.38 mm; mean CORR = 0.94 in Kinect-Vicon comparison), as well as comparable intra-session reliability to Vicon. However, the Kinect device consistently overestimated the 95% CL of sway by about 3 mm. This offset could be due to the limited accuracy, resolution, and sensitivity of the Kinect sensors. The Kinect device was more accurate in the medial-lateral than in the anterior-posterior direction, and performed better than the force plate in more challenging balance tasks, such as (ECf) with larger TBCM sway. Overall, Kinect is a cost-effective alternative to a motion capture and force plate system for clinical assessment of TBCM sway. (C) 2014 Elsevier B. V. All rights reserved.