Combining Freehand Ultrasound-Based Indentation and Inverse Finite Element Modelling for the Identification of Hyperelastic Material Properties of Thigh Soft Tissues
TypeArticles dans des revues avec comité de lecture
Finite Element Analysis (FEA) is a numerical modelling tool vastly employed in research facilities to analyse and predict load transmission between the human body and a medical device, such as a prosthesis or an exoskeleton. Yet, the use of Finite Element Modelling (FEM) in a framework compatible with clinical constraints is hindered by, amongst others, heavy and time-consuming assessments of material properties. Ultrasound imaging opens new and unique opportunities for the assessment of in vivo material properties of soft tissues. Confident of these advances, a method combining a freehand ultrasound probe and a force sensor was developed in order to compute the hyperelastic constitutive parameters of the soft tissues of the thigh in both relaxed (R) and contracted (C) muscles configurations. Seven asymptomatic subjects were included for the experiment. Two operators in each configuration performed the acquisitions. Inverse FEM allowed for the optimisation of an Ogden’s hyperelastic constitutive model of soft tissues of the thigh in large displacement. The mean shear modulus identified for configurations R and C were respectively 3.2 ± 1.3 kPa and 13.7 ± 6.5 kPa. The mean alpha parameter identified for configurations R and C were respectively 10 ± 1 and 9 ± 4. An analysis of variance showed that the configuration had an effect on constitutive parameters but not the operator.
Files in this item
Showing items related by title, author, creator and subject.
In vivo identification of the mechanical properties of thigh tissues from FreeHand Ultrasound for the numerical investigation of loads at the socket/residual limb interface of amputee people FOUGERON, Nolwenn; BONNET, Xavier; ROSE, Jean-Loïc; ROHAN, Pierre-Yves; PILLET, Hélène (2019)Prosthetic sockets are custom-designed and are decisive for functionality and comfort of limb prosthesis. To ensure load transmission and stability, high interface stresses are applied. Several computer models of the ...
Subject Specific Finite Element Mesh Generation of the Pelvis from Biplanar X-ray Images: Application to 120 clinical cases FOUGERON, Nolwenn; ROHAN, Pierre-Yves; MACRON, Aurélien; TRAVERT, Christophe; PILLET, Hélène; SKALLI, Wafa (2018)Several Finite Element (FE) models of the pelvis have been developed to comprehensively assess the onset of pathologies and for clinical and industrial applications. However, because of the difficulties associated with the ...
Subject specific hexahedral Finite Element mesh generation of the pelvis from bi-Planar X-ray images FOUGERON, Nolwenn; PILLET, Hélène; SKALLI, Wafa; ROHAN, Pierre-Yves (Informa UK Limited, 2017)Several Finite Element (FE) models of the pelvis have been developed to comprehensively assess the onset of pathologies and for clinical and industrial applications. However, because of the difficulties associated with the ...
ROHAN, Pierre-Yves; PILLET, Hélène; SKALLI, Wafa; TRNKA, Julien; MANASSERO, Mathieu; VIATEAU, Véronique; CAROUX, Julien; CORTÉ, Laurent (2017)Introduction Rupture of the Anterior Cruciate Ligament (ACL) affects about 1 person over 3000 every year. The current standard care is based on ligament reconstruction by autograft from tendon tissues and is considered as ...
Development and evaluation of a new methodology for the fast generation of patient-specific Finite Element models of the buttock for sitting-acquired deep tissue injury prevention MACRON, Aurélien; PILLET, Hélène; DORIDAM, Jennifer; VERNEY, Alexandre; ROHAN, Pierre-Yves (Elsevier BV, 2018)The occurrence and management of Pressure Ulcers remain a major issue for patients with reduced mobility and neurosensory loss despite significant improvement in the prevention methods. These injuries are caused by biological ...