Modeling of Viscoelastic and Nonlinear Material Properties of Liver Tissue using Fractional Calculations
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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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- WATANABE Hiroki
- 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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- KAWAMURA Kazuya
- Faculty of Science and Engineering, Waseda University
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- FUJIE Masakatsu G.
- Faculty of Science and Engineering, Waseda University
抄録
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.
収録刊行物
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- Journal of Biomechanical Science and Engineering
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Journal of Biomechanical Science and Engineering 7 (2), 177-187, 2012
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282680238783872
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- NII論文ID
- 130002066901
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- ISSN
- 18809863
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可