A quasi-nonlinear analysis of the anisotropic behaviour of human gallbladder wall.
A quasi-nonlinear analysis of the anisotropic behaviour of human gallbladder wall.
复制标题
人胆囊壁各向异性行为的准非线性分析。
DOI:
10.1115/1.4007633
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Li WG
中科院分区:
文献类型:
--
作者:
Li WG
Estimation of biomechanical parameters of soft tissues from noninvasive measurements has clinical significance in patient-specific modeling and disease diagnosis. In this work, we present a quasi-nonlinear method that is used to estimate the elastic moduli of the human gallbladder wall. A forward approach based on a transversely isotropic membrane material model is used, and an inverse iteration is carried out to determine the elastic moduli in the circumferential and longitudinal directions between two successive ultrasound images of gallbladder. The results demonstrate that the human gallbladder behaves in an anisotropic manner, and constitutive models need to incorporate this. The estimated moduli are also nonlinear and patient dependent. Importantly, the peak stress predicted here differs from the earlier estimate from linear membrane theory. As the peak stress inside the gallbladder wall has been found to strongly correlate with acalculous gallbladder pain, reliable mechanical modeling for gallbladder tissue is crucial if this information is to be used in clinical diagnosis.
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DOI:
10.1002/nme.1807
发表时间:
2007-02-05
影响因子:
2.9
作者:
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DOI:
10.1152/ajplegacy.1969.217.4.1030
发表时间:
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期刊:
The American journal of physiology
影响因子:
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DOI:
10.1016/0010-406x(69)91358-9
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1969
期刊:
Comparative biochemistry and physiology
影响因子:
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DOI:
10.1016/0045-7825(74)90030-9
发表时间:
1974
影响因子:
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