Measurement and characterization of soft tissue behavior with surface deformation and force response under large deformations

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Soft tissue characterization with the inverse finite element method (FEM) optimization algorithm plays an important role in developing a physical model for medical simulations. However, tissue characterization that takes into account comprehensive boundary conditions for large deformations remains a challenge due to computational complexities and a lack of experimental data. In this study, soft tissue experiments on porcine livers were performed to measure the surface deformation and force response Of Soft tissues resulting from indentation loading depending on various indentation depths and two different tip shapes. Measurements were carried out with a three-dimensional (3D) optical system and a force transducer. Using the surface deformation and force response results, we estimated the maximum radius of influence, which can be utilized to determine the minimal required soft tissue model size for the FEM simulation. Considering the influence of the boundary conditions, the model was designed and integrated into an inverse FEM optimization algorithm to estimate the model parameters. The mechanical behavior of large deformations was characterized with FE modeling via hyperelastic and linear viscoelastic models. (C) 2009 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2010-04
Language
English
Article Type
Article
Keywords

IN-VIVO; MECHANICAL-PROPERTIES; VISCOELASTIC PROPERTIES; LIVER-TISSUE; INDENTATION; SIMULATION; MODEL; COMPRESSION; ENVIRONMENT; SURGERY

Citation

MEDICAL IMAGE ANALYSIS, v.14, no.2, pp.138 - 148

ISSN
1361-8415
DOI
10.1016/j.media.2009.10.006
URI
http://hdl.handle.net/10203/94918
Appears in Collection
ME-Journal Papers(저널논문)
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