Error due to the soft tissue artefact (STA) on the hip joint kinematics during unrestricted activities of daily living.
Dataset for a compensation model of the STA on the hip joint kinematics, based on anthropometric and kinematic parameters
OPEN ACCESS
Loading...
Author / Producer
Date
2020-03-12
Publication Type
Dataset
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Abstract
Soft tissue artefact (STA) affects the kinematics retrieved with skin marker-based motion capture, and thus influences the outcomes of biomechanical models that rely on such kinematics. In order to be compensated for, the effects of STA must be characterized across a broad sample population and for different motion activities. In this study, the error introduced by STA on the kinematics of the hip joint and of its individual components, and on the location of the hip joint center (HJC) was quantified for fifteen THA subjects during overground gait, stair descent, chair rise and putting on socks. The error due to STA was computed as the difference between the kinematics measured with motion capture and those measured simultaneously with moving fluoroscopy, a STA-free X-ray technique. The main significant effects of STA were: underestimation of the hip range of motion for all four activities, underestimation of the flexion especially during phases of the motion with higher flexion, overestimation of the internal rotation, and lateral misplacement of the HJC mostly due to the functional calibration. The thigh contributed more to the STA error than the pelvis. The STA error of the thigh appeared to be correlated with the hip flexion angles, with a varying degree of linearity depending on the activity and on the phase of the motion cycle. Future kinematic-driven STA compensation models should take into account the non-linearity of the STA error and its dependency of the phase of the motion cycle.
Permanent link
Publication status
External links
Editor
Contributors
Contact person : D'Isidoro, Fabio
Data collector : D'Isidoro, Fabio
Data collector : Brockmann, Clara
Research group : Ferguson, Stephen J.
Book title
Journal / series
Volume
Pages / Article No.
Publisher
ETH Zurich
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Organisational unit
03915 - Ferguson, Stephen / Ferguson, Stephen
02518 - Institut für Biomechanik / Institute for Biomechanics
Notes
Funding
Related publications and datasets
Is supplement to: 10.1016/j.jbiomech.2020.109717