Validity and Reliability of Inertial Measurement Unit (IMU)-Derived 3D Joint Kinematics in Persons Wearing Transtibial Prosthesis
3
Issued Date
2023-02-01
Resource Type
ISSN
14248220
Scopus ID
2-s2.0-85147893033
Pubmed ID
36772783
Journal Title
Sensors
Volume
23
Issue
3
Rights Holder(s)
SCOPUS
Bibliographic Citation
Sensors Vol.23 No.3 (2023)
Suggested Citation
Rattanakoch J., Samala M., Limroongreungrat W., Guerra G., Tharawadeepimuk K., Nanbancha A., Niamsang W., Kerdsomnuek P., Suwanmana S. Validity and Reliability of Inertial Measurement Unit (IMU)-Derived 3D Joint Kinematics in Persons Wearing Transtibial Prosthesis. Sensors Vol.23 No.3 (2023). doi:10.3390/s23031738 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/81667
Title
Validity and Reliability of Inertial Measurement Unit (IMU)-Derived 3D Joint Kinematics in Persons Wearing Transtibial Prosthesis
Author's Affiliation
Other Contributor(s)
Abstract
Background: A validity and reliability assessment of inertial measurement unit (IMU)-derived joint angular kinematics during walking is a necessary step for motion analysis in the lower extremity prosthesis user population. This study aimed to assess the accuracy and reliability of an inertial measurement unit (IMU) system compared to an optical motion capture (OMC) system in transtibial prosthesis (TTP) users. Methods: Thirty TTP users were recruited and underwent simultaneous motion capture from IMU and OMC systems during walking. Reliability and validity were assessed using intra- and inter-subject variability with standard deviation (S.D.), average S.D., and intraclass correlation coefficient (ICC). Results: The intra-subject S.D. for all rotations of the lower limb joints were less than 1° for both systems. The IMU system had a lower mean S.D. (o), as seen in inter-subject variability. The ICC revealed good to excellent agreement between the two systems for all sagittal kinematic parameters. Conclusion: All joint angular kinematic comparisons supported the IMU system’s results as comparable to OMC. The IMU was capable of precise sagittal plane motion data and demonstrated validity and reliability to OMC. These findings evidence that when compared to OMC, an IMU system may serve well in evaluating the gait of lower limb prosthesis users.