Modelling liver tissue properties using a non-linear visco-elastic model for surgery simulation
Modelling liver tissue properties using a non-linear visco-elastic model for surgery simulation
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DOI：
10.1016/j.media.2004.11.002
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发表时间：
2005-04-01
影响因子：
10.9
通讯作者：
Laurendeau, D
中科院分区：
文献类型：
--
作者：
Schwartz, JM;Denninger, M;Laurendeau, D
在这项工作中，我们引入了线弹性张量质量方法的扩展，允许快速计算非线性和粘弹性机械力和变形，以模拟生物软组织。我们的目标是开发一种用于规划肝癌低温手术治疗的模拟工具。经皮手术模拟需要对软组织的力学行为进行精确建模，之前的实验表征表明，线弹性只是生物组织真实特性的粗略近似。我们首先表明，我们的模型可以以与实时应用兼容的速度模拟不同类型的非线性和粘弹性机械行为。然后提出了一种实验装置，用于表征活检针穿孔下鹿肝组织的机械特性。实验结果表明，线性模型不适合模拟该应用，而所提出的模型成功地对针上测量的轴向载荷进行了精确建模。 (c) 2004 Elsevier B.V. 保留所有权利。
In this work, we introduce an extension of the linear elastic tensor-mass method allowing fast computation of non-linear and visco-elastic mechanical forces and deformations for the simulation of biological soft tissue. We aim at developing a simulation tool for the planning of cryogenic surgical treatment of liver cancer. Percutaneous surgery simulation requires accurate modelling of the mechanical behaviour of soft tissue, and previous experimental characterizations have shown that linear elasticity is only a coarse approximation of the real properties of biological tissues. We first show that our model can simulate different types of non-linear and visco-elastic mechanical behaviours at speeds which are compatible with real-time applications. Then an experimental setup is presented which was used to characterize the mechanical properties of deer liver tissue under perforation by a biopsy needle. Experimental results demonstrate that a linear model is not suitable for simulating this application, while the proposed model succeeds in accurately modelling the axial load measured on the needle. (c) 2004 Elsevier B.V. All rights reserved.