Category: Technology
Objective: This study aims to validate a 2D light detection and ranging (LiDAR) based gait analysis system with a reference system. In addition, the optimal height for measurement of human gait using the 2D-LiDAR sensor was also analyzed.
Background: The gait analysis system is widely used for evaluation of locomotion and gait disorders. LiDAR is a method of measuring distance using a laser reflection, which has a potential as an accurate and portable gait analysis instrument due to its small size and accuracy. Therefore,
Method: Subjects walked five times in front of the sensor range of the 2D-LiDAR gait analysis system and on the pressure walkway of the reference gait analysis system (GAITRite®) simultaneously. The trial was repeated changing the height of 2D-LiDAR sensor to 10, 12, 14, 16, and 18 cm. Spatiotemporal parameters such as step length, stride length, step width, and step time were extracted from two gait analysis systems. The agreement between the parameters was evaluated using intra-class correlation coefficient (ICC).
Results: Seven healthy volunteers participated in this study. Agreements of the step length and stride length showed good results, with ICC exceeding 0.9 at all measured heights. However, for the step width, ICC was 0.934 (95% confidence interval [CI] [0.882, 0.960], p<0.001) at 10 cm, but the result sequentially decreased as the measurement height increased (ICC of 12, 14, 16, and 18 cm = 0.741, 0.619, 0.557, and 0.486, respectively).
Conclusion: The 2D-LiDAR-based gait analysis system showed excellent results in measuring the length parameters compared to the reference system. However, it is better to make the position of the LiDAR sensor as low as possible for measuring the step width. The optimal sensor height of LiDAR-based gait analysis system should be determined balancing the advantages of measuring accuracy and potential disadvantages of ground obstacles of low height.
To cite this abstract in AMA style:
S. Woo, C. Shin, MY. Kim. Optimal measuring height and validation of 2D-LiDAR based analysis system for spatiotemporal gait parameters [abstract]. Mov Disord. 2024; 39 (suppl 1). https://www.mdsabstracts.org/abstract/optimal-measuring-height-and-validation-of-2d-lidar-based-analysis-system-for-spatiotemporal-gait-parameters/. Accessed June 14, 2025.« Back to 2024 International Congress
MDS Abstracts - https://www.mdsabstracts.org/abstract/optimal-measuring-height-and-validation-of-2d-lidar-based-analysis-system-for-spatiotemporal-gait-parameters/