Inverse Finite Element Characterization of Soft Tissues

Authors:
M. Kauer;V. Vuskovic;J. Dual;Gábor Székely;Michael Bajka
Affiliations:
-;-;-;-;-
Venue:
MICCAI '01 Proceedings of the 4th International Conference on Medical Image Computing and Computer-Assisted Intervention
Year:
2001

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Abstract

In this work a tissue aspiration method for the in-vivo determination of biological soft tissue material parameters is presented. An explicit axisymmetric finite element simulation of the aspiration experiment is used together with a Levenberg-Marquardt algorithm to estimate the material model parameters in an inverse parameter determination process. Soft biological tissue is modelled as a viscoelastic, non-linear, nearly incompressible, isotropic continuum. Viscoelasticity is accounted for by a quasi-linear formulation. The aspiration method is validated experimentally with a synthetic material. In-vivo (intra-operatively during surgical interventions) and ex-vivo experiments were performed on human uteri.