Título:
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Determining the constitutive parameters of the human femoral vein in specific patients
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Autor/a:
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Fortuny Anguera, Gerard; Herrera, Blas; Marimón, Francesc; Marcé Nogué, Jordi
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria; Universitat Politècnica de Catalunya. LITEM - Laboratori per a la Innovació Tecnològica d'Estructures i Materials |
Abstract:
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This study suggests a method for computing the constitutive model for veins in
vivo from clinically registered ultrasound images. The vein is modelled as a hyperelastic,
incompressible, thin-walled cylinder and the membrane stresses are computed using strain
energy. The material parameters are determined by tuning the membrane stress to the stress
obtained by enforcing global equilibrium.
In addition to the mechanical model, the study also suggests a preconditioning of the
pressure-radius signal. The preconditioning computes an average pressure-radius cycle from
all consecutive cycles in the registration and removes, or reduces undesirable disturbances. In
order to overcome this problem, an approach is proposed that allows constitutive equations to
be determined from clinical data by means of reasonable assumptions regarding in situ
configurations and stress states of vein walls. The approach is based on a two-dimensional
Fung-type stored-energy function that captures the characteristic nonlinear and anisotropic
responses of veins. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria biomèdica::Electrònica biomèdica -Àrees temàtiques de la UPC::Ciències de la salut::Medicina::Diagnòstic per la imatge -Diagnostic ultrasonic imaging -Femoral vein -Constitutive equations -Venous live tissue -Human -Parameter identification -Imatges ultrasonores -Tromboembolisme -- Diagnòstic |
Derechos:
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Tipo de documento:
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Artículo - Versión publicada Objeto de conferencia |
Editor:
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International Center for Numerical Methods in Engineering.
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