A computational approach to calculate personalized pennation angle based on MRI: effect on motion analysis

Article Article scientifique Article A computational approach to calculate personalized pennation angle based on MRI: effect on motion analysis eng 2016 author Chincisan Andra-Ioana-Maria 791734 author Tecante Karelia author Becker Matthias 777412 author Magnenat Thalmann Nadia 24684 author Hurschler Christof author Choi Hon Fai 796899 683-693 10.1007/s11548-015-1251-9 1861-6410 http://link.springer.com/10.1007/s11548-015-1251-9 Purpose Muscles are the primary component responsible for the locomotion and change of posture of the human body. The physiologic basis of muscle force production and movement is determined by the muscle architecture (maximum muscle force, Fmo, optimal muscle fiber length, lmo, tendon slack length, lts, and pennation angle at optimal muscle fiber length, φ0). The pennation angle is related to the maximum force production and to the range of motion. The aim of this study was to investigate a computational approach to calculate subject-specific pennation angle from magnetic resonance images (MRI)-based 3D anatomical model and to determine the impact of this approach on the motion analysis with personalized musculoskeletal models. Methods A 3D method that calculates the pennation angle using MRI was developed. The fiber orientations were automatically computed, while the muscle line of action was determined using approaches based on anatomical landmarks and on centroids of image segmentation. Three healthy male volunteers were recruited for MRI scanning and motion capture acquisition. This work evaluates the effect of subject-specific pennation angle as musculoskeletal parameter in the lower limb, focusing on the quadriceps group. A comparison was made for assessing the contribution of personalized models on motion analysis. Gait and deep squat were analyzed using neuromuscular simulations (OpenSim). Results The results showed variation of the pennation angle between the generic and subject-specific models, demonstrating important interindividual differences, especially for the vastus intermedius and vastus medialis muscles. The pennation angle variation between personalized and generic musculoskeletal models generated significant variation in muscle moments and forces during dynamic motion analysis. Conclusions A MRI-based approach to define subject-specific pennation angle was proposed and evaluated in motion analysis models. The significant differences obtained for the moments and muscle forces in quadriceps muscles indicate that a personalized approach in modeling the pennation angle can provide more individual details when investigating motion behaviors in specific subjects. MRI Pennation angle Fascicle orientation Muscle Quadriceps Muscle line Dewey 025.063 Dewey 330/650 13 Centre universitaire d'informatique 0D3 9 Faculté d'économie et de management S false 899 MIRALab International Journal of Computer Assisted Radiology and Surgery 11 5 e6f550d6-a8fb-45e5-a993-b24341f9e9b7 Article (Published version) Restricted 2016Chincisan_comput_approach_calculate.pdf 3171891 application/pdf restrictedAccess Centres et instituts / Centre universitaire d'informatique Faculté d'économie et de management

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A computational approach to calculate personalized pennation angle based on MRI: effect on motion analysis	International Journal of Computer Assisted Radiology and Surgery			2016	564	0

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Choi, Hon Fai