On the imaging of slip boundaries using 3D elastography
On the imaging of slip boundaries using 3D elastography
复制标题
使用 3D 弹性成像对滑移边界进行成像
DOI：
10.1109/ultsym.2009.5441722
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
J. Bamber
中科院分区：
文献类型：
--
作者：
Leo J Garcia;C. Uff;J. Fromageau;J. Bamber
滑动弹性成像是弹性成像的一个新分支，它结合了剪切应变成像和力估计，旨在检测和表征肿瘤与其周围环境之间的滑动边界。本文介绍了滑移弹性成像的原理。假设由于跨越滑移边界的剪切运动可能会产生表观剪切应变。这是通过有限元模拟和模型实验进行研究的。研究发现，与粘附时相比，当肿瘤边界自由滑动时，肿瘤边界上的轴向剪切应变更大。发现了滑动运动的其他指标：肿瘤边界处位移数据的不连续梯度；由于肿瘤边界处位移的局部空间梯度高，导致肿瘤周围的高轴向应变；肿瘤内轴向应变分布不均匀；肿瘤内部的轴向剪切应变对比。将来，这些指示器将用于帮助定位扫描平面中的滑移边界。
Slip elastography is a new branch of elastography which incorporates shear strain imaging and force estimation, with a view to detecting and characterizing slip boundaries between tumors and their surroundings. This paper introduces the principles of slip elastography. It is hypothesized that apparent shear strains may arise due to shear motion across a slip boundary. This is investigated through FEM simulation and phantom experiments. It was found that axial shear strain across a tumor boundary is greater when it may slip freely against the surrounding material compared to when it is adhered. Additional indicators of slip motion were found: discontinuous gradients in displacement data at the tumor boundary; high axial strain surrounding the tumor, as a result of high local spatial gradients in displacement at the tumor boundary; inhomogeneous distribution axial strain within the tumor; axial shear strain contrast inside the tumor. In the future, these indicators will be used to help locate slip boundaries in the scan plane.
影响因子：
4.2
作者：
Konofagou, EE;Harrigan, T;Ophir, J
通讯作者：
Ophir, J