• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Enhancing the performance of lateral shear strain estimation by using 2-D strain imaging
【24h】

Enhancing the performance of lateral shear strain estimation by using 2-D strain imaging

机译：通过使用二维应变成像增强横向剪切应变估算的性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Radio-frequency (RF) ultrasound can be used to estimate deformation of biological tissue. Decorrelation of sequentially acquired ultrasound signals resulting from the deformation imposes a limitation on the precision (elastographic signal-to-noise ratio; SNRe) of estimating these deformations; this is presented as the lateral shear strain filter. In this paper, we explore the effect of a 2-D-window-based strain estimation approach on the lateral shear strain filter and propose an extension of the 1-D theoretical lateral shear strain filter to 2-D. We compared the performance of the 2-D approach in simulated ultrasound data and a tissue-mimicking phantom with that of the 2-D lateral shear strain filter. In simulations, the 2-D-window-based approach shows an effect in the axial direction similar to the 2-D prediction. In simulations and experiments, increasing the window size in the lateral direction shows an increase in the maximum SNRe of the lateral shear strain filter. Increasing the lateral overlap has no effect on the estimation of lateral shear strain. These results were confirmed in the tissue-mimicking phantom experiments. When compared with the 2-D lateral shear strain filter, the results obtained with the 2-D-window-based approach showed an enhanced performance by incorporating the lateral window size in the lateral shear strain estimation, which was consistent with the proposed theory.
机译：射频（RF）超声可用于估计生物组织的变形。由变形产生的顺序获取的超声信号的去相关性对估计这些变形的精度（弹性成像信噪比； SNRe）施加了限制。它被表示为横向剪切应变滤波器。在本文中，我们探讨了基于2-D窗口的应变估计方法对横向剪切应变滤波器的影响，并提出了将1-D理论横向剪切应变滤波器扩展到2-D的方法。我们比较了二维方法在模拟超声数据和模拟组织幻影中的性能与二维横向剪切应变滤波器的性能。在模拟中，基于2-D窗口的方法在轴向上显示出与2-D预测相似的效果。在模拟和实验中，沿横向方向增大窗口大小会显示横向剪切应变滤波器的最大SNRe增大。横向重叠的增加对横向剪切应变的估计没有影响。这些结果在模仿组织的幻象实验中得到了证实。与二维横向剪应变滤波器相比，基于二维窗口的方法所获得的结果通过在横向剪应变估算中纳入横向窗口大小而显示出增强的性能，这与所提出的理论是一致的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号