Functional calibration procedure for 3D knee joint angle description using inertial sensors.

Details

Serval ID
serval:BIB_4F3B96EF26B5
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Functional calibration procedure for 3D knee joint angle description using inertial sensors.
Journal
Journal of Biomechanics
Author(s)
Favre J., Aissaoui R., Jolles B.M., de Guise J.A., Aminian K.
ISSN
1873-2380[electronic]
Publication state
Published
Issued date
2009
Volume
42
Number
14
Pages
2330-2335
Language
english
Abstract
Measurement of three-dimensional (3D) knee joint angle outside a laboratory is of benefit in clinical examination and therapeutic treatment comparison. Although several motion capture devices exist, there is a need for an ambulatory system that could be used in routine practice. Up-to-date, inertial measurement units (IMUs) have proven to be suitable for unconstrained measurement of knee joint differential orientation. Nevertheless, this differential orientation should be converted into three reliable and clinically interpretable angles. Thus, the aim of this study was to propose a new calibration procedure adapted for the joint coordinate system (JCS), which required only IMUs data. The repeatability of the calibration procedure, as well as the errors in the measurement of 3D knee angle during gait in comparison to a reference system were assessed on eight healthy subjects. The new procedure relying on active and passive movements reported a high repeatability of the mean values (offset<1 degrees) and angular patterns (SD<0.3 degrees and CMC>0.9). In comparison to the reference system, this functional procedure showed high precision (SD<2 degrees and CC>0.75) and moderate accuracy (between 4.0 degrees and 8.1 degrees) for the three knee angle. The combination of the inertial-based system with the functional calibration procedure proposed here resulted in a promising tool for the measurement of 3D knee joint angle. Moreover, this method could be adapted to measure other complex joint, such as ankle or elbow.
Keywords
Knee, 3D Kinematics, Inertial sensors, Functional calibration, Ambulatory measurement, Gyroscopes, Accelerometers, Anatomical Frame, Gait Analysis, Coordinate System, Helical Axes, Kinematics, Movement, Repeatability, Flexion, Stereophotogrammetry, Motions
Pubmed
Web of science
Create date
10/11/2009 13:54
Last modification date
20/08/2019 14:05
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