kinematics; skin markers; MRI; anatomy; glenohumeral; coherence index
Abstract :
[en] Optoelectronic systems are widely used in 3D motion capture. However, the reliability of the motion estimation depends on soft tissue artifacts and should therefore be validated. Two different sets of humeral markers were studied on four subjects. Anatomical and kinematic measurements were combined and the plausibility of the relative position of the bones in the glenohumeral joint during motion was evaluated using a new coherence index. Our findings show that an identical protocol leads to a large variability of the articular coherence for the subjects. However the use of an extra marker on the distal part of the humerus improves the humeral kinematics for three of the four subjects. Scientists and clinicians using 3D systems should remain aware of the influence of subject-specific morphology on the accuracy of the measure. Differences with a reference group may come from clinical reasons but also from measurement errors due to the inter-individual morphological differences.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others Human health sciences: Multidisciplinary, general & others
Author, co-author :
Schwartz, Cédric ; Université de Liège - ULiège > Département des sciences de la motricité > Kinésithérapie générale et réadaptation
Leboeuf, Fabien; CHU Nantes > Pôle médecine physique et de réadaptation
Rémy-Néris, Olivier; CHU Brest > Service de médecine physique et de réadaptation
Brochard, Sylvain; CHU Brest > Service de médecine physique et de réadaptation
Lempereur, Mathieu; CHU Brest > Service de médecine physique et de réadaptation
Burdin, Valérie; Telecom Bretagne > Image et Traitement de l’Information
Language :
English
Title :
Using merged kinematic and anatomical data to evaluate humeral motion estimation: a pilot study
Publication date :
2013
Journal title :
Computer Methods in Biomechanics and Biomedical Engineering. Imaging and Visualization
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