Numerical simulations of magnetic resonance elastography using finite element analysis with a linear heterogeneous viscoelastic model

Tomita, Sunao; Suzuki, Hayato; Kajiwara, Itsuro; Nakamura, Gen; Jiang, Yu; Suga, Mikio; Obata, Takayuki; Tadano, Shigeru

Numerical simulations of magnetic resonance elastography using finite element analysis with a linear heterogeneous viscoelastic model

Tomita, Sunao; Suzuki, Hayato; Kajiwara, Itsuro et al.

Journal of visualization, 2018, 21(1), 133-145

Permalink : https://hdl.handle.net/2115/68305

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アクセス権	open access
URI	https://hdl.handle.net/2115/68305
タイトル	Numerical simulations of magnetic resonance elastography using finite element analysis with a linear heterogeneous viscoelastic model
著者	Tomita, Sunao ; Suzuki, Hayato ; Kajiwara, Itsuro ; Nakamura, Gen ; Jiang, Yu ; Suga, Mikio ; Obata, Takayuki ; Tadano, Shigeru
著者名 Tomita, Sunao
著者名 Suzuki, Hayato
e-Rad_Researcher 60224416 著者名 Kajiwara, Itsuro
著者名 Nakamura, Gen
著者名 Jiang, Yu
著者名 Suga, Mikio
著者名 Obata, Takayuki
e-Rad_Researcher 50175444 著者名 Tadano, Shigeru
言語	英語
キーワード	Magnetic resonance elastography
	Elastogram
	Viscoelasticity
	Finite element analysis
	Liver
発行日	2018-02
出版者	Springer
収録物名	Journal of visualization
巻(号)	21(1)
ページ	133-145
抄録	Magnetic resonance elastography (MRE) is a technique to identify the viscoelastic moduli of biological tissues by solving the inverse problem from the displacement field of viscoelastic wave propagation in a tissue measured by MRI. Because finite element analysis (FEA) of MRE evaluates not only the viscoelastic model for a tissue but also the efficiency of the inversion algorithm, we developed FEA for MRE using commercial software called ANSYS, the Zener model for displacement field of a wave inside tissue, and an inversion algorithm called the modified integral method. The profile of the simulated displacement field by FEA agrees well with the experimental data measured by MRE for gel phantoms. Similarly, the value of storage modulus (i.e., stiffness) recovered using the modified integral method with the simulation data is consistent with the value given in FEA. Furthermore, applying the suggested FEA to a human liver demonstrates the effectiveness of the present simulation scheme.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
PISSN	1343-8875
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1007/s12650-017-0436-4