Continuous mobile measurement of camptocormia angle using four accelerometers.

IF 2.6 4区 医学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Medical & Biological Engineering & Computing Pub Date : 2024-06-27 DOI:10.1007/s11517-024-03149-1
K Naderi Beni, K Knutzen, J P Kuhtz-Buschbeck, N G Margraf, R Rieger
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Abstract

Camptocormia, a severe flexion deformity of the spine, presents challenges in monitoring its progression outside laboratory settings. This study introduces a customized method utilizing four inertial measurement unit (IMU) sensors for continuous recording of the camptocormia angle (CA), incorporating both the consensual malleolus and perpendicular assessment methods. The setup is wearable and mobile and allows measurements outside the laboratory environment. The practicality for measuring CA across various activities is evaluated for both the malleolus and perpendicular method in a mimicked Parkinson disease posture. Multiple activities are performed by a healthy volunteer. Measurements are compared against a camera-based reference system. Results show an overall root mean squared error (RMSE) of 4.13° for the malleolus method and 2.71° for the perpendicular method. Furthermore, patient-specific calibration during the standing still with forward lean activity significantly reduced the RMSE to 2.45° and 1.68° respectively. This study presents a novel approach to continuous CA monitoring outside the laboratory setting. The proposed system is suitable as a tool for monitoring the progression of camptocormia and for the first time implements the malleolus method with IMU. It holds promise for effectively monitoring camptocormia at home.

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使用四个加速度计对凸轮角进行连续移动测量。
驼峰畸形是一种严重的脊柱屈曲畸形,在实验室以外的环境中监测其进展情况是一项挑战。本研究介绍了一种定制方法,利用四个惯性测量单元(IMU)传感器连续记录凸轮畸形角度(CA),并结合了踝关节共识和垂直评估方法。该装置可穿戴、可移动,允许在实验室环境外进行测量。在模仿帕金森病患者的姿势下,评估了踝关节和垂直法测量各种活动中踝关节角度的实用性。一名健康志愿者进行了多项活动。测量结果与基于相机的参考系统进行了比较。结果显示,踝骨法的总体均方根误差 (RMSE) 为 4.13°,垂直法为 2.71°。此外,在静立前倾活动中对患者进行校准,可将均方根误差分别显著降至 2.45°和 1.68°。本研究提出了一种在实验室环境外进行连续 CA 监测的新方法。所提出的系统适合作为监测凸轮畸形进展的工具,并首次使用 IMU 实现了踝关节法。该系统有望在家中有效监测驼背。
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来源期刊
Medical & Biological Engineering & Computing
Medical & Biological Engineering & Computing 医学-工程:生物医学
CiteScore
6.00
自引率
3.10%
发文量
249
审稿时长
3.5 months
期刊介绍: Founded in 1963, Medical & Biological Engineering & Computing (MBEC) continues to serve the biomedical engineering community, covering the entire spectrum of biomedical and clinical engineering. The journal presents exciting and vital experimental and theoretical developments in biomedical science and technology, and reports on advances in computer-based methodologies in these multidisciplinary subjects. The journal also incorporates new and evolving technologies including cellular engineering and molecular imaging. MBEC publishes original research articles as well as reviews and technical notes. Its Rapid Communications category focuses on material of immediate value to the readership, while the Controversies section provides a forum to exchange views on selected issues, stimulating a vigorous and informed debate in this exciting and high profile field. MBEC is an official journal of the International Federation of Medical and Biological Engineering (IFMBE).
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