PDF(Pubmed)
Abstract：
(1) Background: Marker-based 3D motion capture systems (MBS) are considered the gold standard in gait analysis. However, they have limitations for which markerless camera-based 3D motion capture systems (MCBS) could provide a solution. The aim of this systematic review and meta-analysis is to compare the accuracy, validity, and reliability of MCBS and MBS. (2) Methods: A total of 2047 papers were systematically searched according to PRISMA guidelines on 7 February 2024, in two different databases: Pubmed (1339) and WoS (708). The COSMIN-tool and EBRO guidelines were used to assess risk of bias and level of evidence. (3) Results: After full text screening, 22 papers were included. Spatiotemporal parameters showed overall good to excellent accuracy, validity, and reliability. For kinematic variables, hip and knee showed moderate to excellent agreement between the systems, while for the ankle joint, poor concurrent validity and reliability were measured. The accuracy and concurrent validity of walking speed were considered excellent in all cases, with only a small bias. The meta-analysis of the inter-rater reliability and concurrent validity of walking speed, step time, and step length resulted in a good-to-excellent intraclass correlation coefficient (ICC) (0.81; 0.98). (4) Discussion and conclusions: MCBS are comparable in terms of accuracy, concurrent validity, and reliability to MBS in spatiotemporal parameters. Additionally, kinematic parameters for hip and knee in the sagittal plane are considered most valid and reliable but lack valid and accurate measurement outcomes in transverse and frontal planes. Customization and standardization of methodological procedures are necessary for future research to adequately compare protocols in clinical settings, with more attention to patient populations.
摘要：
(1)背景:基于标记的3D运动捕捉系统(MBS)被认为是步态分析中的黄金标准。然而,基于无标记相机的3D运动捕捉系统（MCBS）可以提供解决方案。本系统综述和荟萃分析的目的是比较准确性，有效性，MCBS和MBS的可靠性。（2）方法：根据PRISMA指南，于2024年2月7日在两个不同的数据库中系统地检索了2047篇论文：Pubmed（1339）和WoS（708）。使用COSMIN工具和EBRO指南评估偏倚风险和证据水平。(3)结果:经过全文筛选,包括22篇论文。时空参数总体上表现出良好的准确性，有效性，和可靠性。对于运动学变量，髋关节和膝关节在系统之间显示出中等到极好的一致性，而对于踝关节，测量了较差的并发效度和信度。在所有情况下，步行速度的准确性和并发有效性都被认为是极好的，只有很小的偏差。步行速度的评分者间信度和并发效度的荟萃分析，步进时间,和步长导致良好到优异的组内相关系数（ICC）（0.81;0.98）。（4）讨论和结论：MCBS在准确性方面具有可比性，并发有效性，时空参数对MBS的可靠性。此外,髋关节和膝关节在矢状面的运动学参数被认为是最有效和可靠的，但缺乏有效和准确的测量结果在横向和额面。方法学程序的定制和标准化对于未来的研究是必要的，以充分比较临床环境中的方案。更多关注患者群体。
