A novel reconstruction method for magnetic resonance elastography based on the Helmholtz decomposition
A novel reconstruction method for magnetic resonance elastography based on the Helmholtz decomposition
复制标题
一种基于亥姆霍兹分解的磁共振弹性成像重构方法
DOI:
10.1016/j.measen.2022.100539
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Nara Takaaki
中科院分区:
文献类型:
--
作者:
Fushimi Motofumi;Nara Takaaki
We present a novel reconstruction method for magnetic resonance elastography, in which the shear modulus and viscosity of biological tissues are estimated from the externally oscillated displacement field obtained using magnetic resonance imaging. The proposed method is based on an integral representation of the stress field derived from the Helmholtz identity for tensor fields and is more robust against measurement noise than conventional methods using the Laplacian of the measured displacement field. We tested the proposed method by numerical simulations and compared it with two methods: the standard “algebraic inversion of the differential equation” method and our previously proposed integral-based method that is restricted to two-dimensional cases. The results showed that the proposed method could reconstruct both the shear modulus and viscosity stably even when noise was added to the data. In the future, we intend to validate the method via experimental data.
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