Description of soft tissue artifacts and related consequences on hindlimb kinematics during canine gait

PeerJ

article

Cheng-Chung Lin¹  Shi-Nuan Wang²  Ming Lu²  Tzu-Yi Chao²  Tung-Wu Lu³  Ching-Ho Wu² 

[1] Department of Electrical Engineering, Fu Jen Catholic University;Institute of Veterinary Clinical Science, National Taiwan University;Department of Biomedical Engineering, National Taiwan University;Department of Surgery, National Taiwan University Veterinary Hospital

关键词: Fluoroscopy;    Gait analysis;    Kinematics;    Marker;    Soft tissue artifacts;    Locomotion;   

DOI  :  10.7717/peerj.9379

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Background Soft tissue artifacts (STAs) are a source of error in marker-based gait analysis in dogs. While some studies have revealed the existence of STAs in the canine hindlimb, STAs and their influence on kinematic gait analysis remain unclear. Methods Thirteen healthy Taiwan dogs affixed with twenty skin markers on the thigh and crus were recruited. Soft tissue artifacts and their influence on the determination of segment poses and stifle angles were assessed by simultaneously measuring marker trajectories and kinematics of the underlying bones via a model-based fluoroscopic analysis method. Results Markers on the thigh showed higher STAs than those on the crus, with root-mean-square amplitudes up to 15.5 mm. None of the tested marker clusters were able to accurately reproduce the skeletal poses, in which the maximum root-mean-square deviations ranged from 3.4° to 8.1°. The use of markers resulted in overestimated stifle flexion during 40–60% of the gait cycle and underestimated stifle flexion during 80–90% of the gait cycle. Conclusions Considerable magnitudes and effects of STAs on the marker-based 3D gait analysis of dogs were demonstrated. The results indicate that the development of error-compensation techniques based on knowledge regarding STAs is warranted for more accurate gait analysis.

【 授权许可】

CC BY