利用照相机和姿势镜从图像中测量躯干旋转角度的方法的可靠性和有效性

IF 1.7 4区 医学 Q3 ENGINEERING, BIOMEDICAL
Dai Nakaizumi , Takaaki Nishimura , Pleiades Tiharu Inaoka , Hitoshi Asai
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引用次数: 0

摘要

本研究旨在通过使用单个摄像头结合姿势镜的图像来测量躯干旋转角度表征,并检验其可靠性和有效性。我们使用三脚架和模拟躯干旋转的标记来建立躯干旋转角度模型。我们比较了两种测量躯干旋转角度的方法:一种是使用手动角度计从上侧测量的传统方法,另一种是使用数码相机和姿势镜拍摄的图像进行测量的新方法。测量误差按动态关节角度计测量的角度与相机和镜子图像计算的角度之间的平均绝对误差计算。计算出的类内相关系数(ICC 1,1)和 ICC(2,1)分别表示两种方法测量角度的评分者内部可靠性和一致性。两种方法测量角度的系统误差通过 Bland-Altman 分析进行检验。平均绝对误差的平均值(标度)为 1.17°(0.71°)。ICC(1,1)为 0.978,ICC(2,1)为 0.991。Bland-Altman 分析显示没有系统误差。结果表明,我们这种测量躯干旋转角度的新方法既有效又准确,而且不需要昂贵的设备或特殊的环境。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Reliability and validity of a method to measure trunk rotation angle from images using a camera and posture mirror

This study aimed to measure trunk rotation angle representations from images using a single camera combined with a posture mirror and to examine its reliability and validity. We applied a trunk rotation angle model using a tripod and markers simulating trunk rotation. We compared two methods of trunk rotation angle measurement: the conventional method from the superior aspect using a manual goniometer and a novel measurement method using images from a digital camera and a posture mirror. Measurement error was calculated as the average absolute error between the angle measured by the goniometer and that calculated from the camera and mirror image. The intraclass correlation coefficient (ICC 1, 1) and ICC (2, 1) were calculated as the intra-rater reliability and agreement between the measurement angles of the two methods, respectively. Systematic errors of the angles measured by the two methods were examined by a Bland‒Altman analysis. The mean (SD) of the mean absolute error was 1.17° (0.71°). ICC (1, 1) was 0.978, and ICC (2, 1) was 0.991. The Bland‒Altman analysis showed no systematic errors. The results suggest the validity and accuracy of our novel method to measure the angle of trunk rotation, which does not require high-cost equipment or a special environment.

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来源期刊
Medical Engineering & Physics
Medical Engineering & Physics 工程技术-工程:生物医学
CiteScore
4.30
自引率
4.50%
发文量
172
审稿时长
3.0 months
期刊介绍: Medical Engineering & Physics provides a forum for the publication of the latest developments in biomedical engineering, and reflects the essential multidisciplinary nature of the subject. The journal publishes in-depth critical reviews, scientific papers and technical notes. Our focus encompasses the application of the basic principles of physics and engineering to the development of medical devices and technology, with the ultimate aim of producing improvements in the quality of health care.Topics covered include biomechanics, biomaterials, mechanobiology, rehabilitation engineering, biomedical signal processing and medical device development. Medical Engineering & Physics aims to keep both engineers and clinicians abreast of the latest applications of technology to health care.
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