Finite element analysis of radiation force induced tissue motion with experimental validation
Finite element analysis of radiation force induced tissue motion with experimental validation
复制标题
辐射力引起的组织运动的有限元分析及实验验证
DOI：
10.1109/ultsym.1999.849240
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
G. Trahey
中科院分区：
文献类型：
--
作者：
K. Nightingale;R. Nightingale;M. Palmeri;G. Trahey
研究了一种基于超声辐射力的组织远程触诊方法。几个研究人员已经提出使用辐射力来成像组织硬度。在本文中，潜在的使用诊断超声系统既施加辐射力和跟踪所产生的组织位移的研究，使用有限元方法（FEM），并与实验结果进行比较。远程触诊是通过散布高强度的推动光束与低强度的跟踪光束。这产生了局部辐射力，可以施加在整个组织，与使用相关技术确定的结果产生的位移模式。比周围介质更硬的区域会分配力，导致更大的位移区域和更小的最大位移。由此产生的位移图提供了关于刚度增加区域的位置和大小的信息。作者开发了一种有限元模型，预测各种复杂介质中诊断换能器产生的声辐射力场引起的位移。他们对辐射力引起的组织位移进行了不同组织和声束特性的参数分析。位移在微米量级，在存在和不存在病变（或硬夹杂物）的情况下，位移模式存在相当大的差异。初步的实验结果支持模型中的研究结果。
An ultrasonic radiation force-based method for remote palpation of tissue is investigated. The use of radiation force to image tissue stiffness has been proposed by several researchers. In this paper, the potential for using a diagnostic ultrasound system to both apply radiation force and track the resulting tissue displacements is investigated using Finite Element Methods (FEM), and the results are compared with experimental results. Remote palpation is accomplished by interspersing high intensity pushing beams with low intensity tracking beams. This generates localized radiation forces which can be applied throughout the tissue, with the resulting displacement patterns determined using correlation techniques. An area that is stiffer than the surrounding medium distributes the force, resulting in larger regions of displacement, and smaller maximum displacements. The resulting displacement maps provide information as to the location and size of regions of increased stiffness. The authors have developed an FEM model that predicts displacements resulting from acoustic radiation force fields generated by diagnostic transducers in various complex media. They perform a parametric analysis of varying tissue and acoustic beam characteristics on radiation force induced tissue displacements. Displacements are on the order of microns, with considerable differences in displacement patterns in the presence and absence of a lesion (or stiff inclusion). Initial experimental results are presented that support the findings in the model.
DOI：
10.1121/1.426854
发表时间：
1999-04
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
W. F. Walker
通讯作者：
W. F. Walker
影响因子：
2.9
作者：
PARKER, KJ;HUANG, SR;LERNER, RM
通讯作者：
LERNER, RM