Three-Dimensional Lower-Limb Kinematics from Accelerometers and Gyroscopes with Simple and Minimal Functional Calibration Tasks: Validation on Asymptomatic Participants

Article Article scientifique Article Three-Dimensional Lower-Limb Kinematics from Accelerometers and Gyroscopes with Simple and Minimal Functional Calibration Tasks: Validation on Asymptomatic Participants eng 2022-07-28 2022-07-28 author Carcreff Léna 0000-0003-0086-4944 844792 author Payen Gabriel 961416 author Grouvel Gautier 0000-0002-2797-7677 959152 author Massé Fabien author Armand Stéphane 0000-0001-9144-4982 636265 5657 10.3390/s22155657 35957218 1424-8220 PMC9370908 https://www.mdpi.com/1424-8220/22/15/5657 <p>The use of inertial measurement units (IMUs) to compute gait outputs, such as the 3D lower-limb kinematics is of huge potential, but no consensus on the procedures and algorithms exists. This study aimed at evaluating the validity of a 7-IMUs system against the optoelectronic system. Ten asymptomatic subjects were included. They wore IMUs on their feet, shanks, thighs and pelvis. The IMUs were embedded in clusters with reflective markers. Reference kinematics was computed from anatomical markers. Gait kinematics was obtained from accelerometer and gyroscope data after sensor orientation estimation and sensor-to-segment (S2S) calibration steps. The S2S calibration steps were also applied to the cluster data. IMU-based and cluster-based kinematics were compared to the reference through root mean square errors (RMSEs), centered RMSEs (after mean removal), correlation coefficients (CCs) and differences in amplitude. The mean RMSE and centered RMSE were, respectively, 7.5° and 4.0° for IMU-kinematics, and 7.9° and 3.8° for cluster-kinematics. Very good CCs were found in the sagittal plane for both IMUs and cluster-based kinematics at the hip, knee and ankle levels (CCs > 0.85). The overall mean amplitude difference was about 7°. These results reflected good accordance in our system with the reference, especially in the sagittal plane, but the presence of offsets requires caution for clinical use.</p> Inertial measurement units Gait kinematics Lower limbs Tridimensional kinematics Clinical gait analysis Dewey 617 Innosuisse—Swiss Innovation Agency (Bern, Switzerland) KINEMAGICS: 3D kinematics for clinical gait analysis using wearable sensors 38215 57 Département de chirurgie 222 false 900 Laboratoire de cinésiologie 943 https://doi.org/10.26037/yareta:kavwr4mzwzcjzepd6gp4cpkdz4 Sensors 22 15 a9cb05bc-f261-4c31-89e0-d5a8e7e88e24 Article (Published version) Public Article-scientifique-from-unpaywall.pdf 2701118 application/pdf CC BY-4.0 11a38c38-b524-46a2-9fd4-a08c09a42057 Supplemental data Public Supplementary material.xlsx 27049 application/vnd.openxmlformats-officedocument.spreadsheetml.sheet openAccess Faculté de médecine / Section de médecine clinique / Département de chirurgie

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Three-Dimensional Lower-Limb Kinematics from Accelerometers and Gyroscopes with Simple and Minimal Functional Calibration Tasks: Validation on Asymptomatic Participants	Sensors			2022	237	439

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Payen, Gabriel