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- Talk
- 15/09/2021
- Canada
Double-Pose Calibration of Inertial Motion Capture for Rapid Knee Evaluation
Description
In this presentation, Xavier Robert-Lachaine introduces a study on the Double-Pose Calibration of Inertial Motion Capture (IMC) for assessing knee kinematics, particularly for rapid evaluation of knee issues like osteoarthritis. The KneeKG technology, developed by Emovi, uses motion analysis to not only alleviate pain but to address underlying causes of knee pathologies, enabling patients to return to normal activities.
The study involved 24 healthy participants with the KneeKG installed on their right knee, utilizing both Optical Motion Capture (OMC) and IMC systems for accuracy measurement. The OMC was calibrated using anatomical landmarks while the IMC used a double-pose calibration technique, assessing motion during treadmill walking at various speeds.
Results indicated that the root-mean-square differences for knee angles were approximately 3 degrees for flexion and around 5 degrees for abduction and external rotation. Differences between OMC and IMC were evident during low-speed walking, particularly during the swing phase compared to the stance phase.
The study concludes that IMC is a feasible method for rapid 3D knee evaluation, with knee joint angles closely mirroring those obtained from OMC within acceptable error limits, especially during the stance phase. The potential benefits of IMC include facilitating clinical assessments and enabling gait analysis in natural settings outside of controlled laboratory environments.