title: Identification of hyperelastic properties of passive thigh muscle under compression with an inverse method from a displacement field measurement.
abstract: The mechanical behavior of muscle tissue is an important field of investigation with different applications in medicine, car crash and sport, for example. Currently, few in vivo imaging techniques are able to characterize the mechanical properties of muscle. Thus, this study presents an in vivo method to identify a hyperelatic behavior from a displacement field measured with ultrasound and Digital Image Correlation (DIC) techniques. This identification approach was composed of 3 inter-dependent steps. The first step was to perform a 2D MRI acquisition of the thigh in order to obtain a manual segmentation of muscles (quadriceps, ischio, gracilis and sartorius) and fat tissue, and then develop a Finite Element model. In addition, a Neo-Hookean model was chosen to characterize the hyperelastic behavior (C10, D) in order to simulate a displacement field. Secondly, an experimental compression device was developed in order to measure the in vivo displacement fields in several areas of the thigh. Finally, an inverse method was performed to identify the C10 and D parameters of each soft tissue. The identification procedure was validated with a comparison with the literature. The relevance of this study was to identify the mechanical properties of each investigated soft tissues.
authors.affiliation: Université de Technologie de Compiègne, UMR CNRS 7338, BioMécanique et BioIngénierie, Compiègne, France; Université de Technologie de Compiègne, UMR CNRS 7337, Laboratoire Roberval, Compiègne, France.
authors.forename: Jean-Sébastien
authors.initials: JS
authors.lastname: Affagard
authors.affiliation: Université de Technologie de Compiègne, UMR CNRS 7337, Laboratoire Roberval, Compiègne, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Feissel
authors.affiliation: Université de Technologie de Compiègne, UMR CNRS 7338, BioMécanique et BioIngénierie, Compiègne, France. Electronic address: sabine.bensamoun@utc.fr.
authors.forename: Sabine F
authors.initials: SF
authors.lastname: Bensamoun
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D004548:Elasticity; D020342:Finite Element Analysis; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008954:Models, Biological; D018482:Muscle, Skeletal / Q000502:physiology; D052097:Quadriceps Muscle / Q000502:physiology*; D013848:Thigh / Q000502:physiology
keywords: Digital Image Correlation (DIC); In vivo mechanical properties; Inverse method; Medical imaging; Thigh muscles