Modeling of Viscoelastic and Nonlinear Material Properties of Liver Tissue using Fractional Calculations
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概要
- 論文の詳細を見る
We present a material model to represent the viscoelastic and material, nonlinear properties of liver tissue for needle insertion simulation. Material properties of liver tissue were measured using a rheometer and modeled from the measured data. The liver viscoelastic characteristics were represented by differential equations, including the fractional derivative term. Next, nonlinearity with respect to the fractional derivative was measured, and the stress-strain relationship using a cubic function was modeled. The material properties of liver tissue were represented by a simple equation with only a few parameters. We evaluated the variety of each stiffness parameter from measurements of 50 samples. The results showed a high degree of variation in each stiffness parameter, especially with respect to nonlinearity. Moreover, each parameter had a low correlation coefficient. We also modeled the probability of variation in material properties from these results to provide a basis for deformation simulations considering individual patient differences.
- 一般社団法人 日本機械学会の論文
著者
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WATANABE Hiroki
Graduate School of Engineering, Yamagata University
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Fujie Masakatsu
Faculty Of Creative Science And Engineering Waseda University
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KAWAMURA Kazuya
Faculty of Science & Engineering, Waseda University
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KAWAMURA Kazuya
Faculty of Science and Engineering, Waseda University
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KOBAYASHI Yo
Faculty of Science and Engineering, Waseda University
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KATO Atsushi
Graduate School of Science and Engineering, Waseda University
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HOSHI Takeharu
Graduate School of Science and Engineering, Waseda University
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