• 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 >A new method for shear wave speed estimation in shear wave elastography
【24h】

A new method for shear wave speed estimation in shear wave elastography

机译：剪切波弹性成像中估计剪切波速度的新方法

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

Visualization of mechanical properties of tissue can aid in noninvasive pathology diagnosis. Shear wave elastography (SWE) measures the elastic properties of soft tissues by estimation of local shear wave propagation speed. In this paper, a new robust method for estimation of shear wave speed is introduced which has the potential for simplifying continuous filtering and real-time elasticity processing. Shear waves were generated by external mechanical excitation and imaged at a high frame rate. Three homogeneous phantoms of varying elastic moduli and one inclusion phantom were imaged. Waves propagating in separate directions were filtered and shear wave speed was estimated by inversion of the 1-D first-order wave equation. Final 2-D shear wave speed maps were constructed by weighted averaging of estimates from opposite traveling directions. Shear wave speed results for phantoms with gelatin concentrations of 5%, 7%, and 9% were 1.52 ?? 0.10 m/s, 1.86 ?? 0.10 m/s, and 2.37 ?? 0.15 m/s, respectively, which were consistent with estimates computed from three other conventional methods, as well as compression tests done with a commercial texture analyzer. The method was shown to be able to reconstruct a 2-D speed map of an inclusion phantom with good image quality and variance comparable to conventional methods. Suggestions for further work are given.
机译：可视化组织的机械特性可以帮助进行非侵入性病理诊断。剪切波弹性成像（SWE）通过估计局部剪切波的传播速度来测量软组织的弹性。本文介绍了一种新的鲁棒的剪切波速度估计方法，该方法具有简化连续滤波和实时弹性处理的潜力。剪切波是由外部机械激励产生的，并以高帧频成像。成像三个弹性模量均一的幻像和一个包含体模。过滤沿不同方向传播的波，并通过一维一阶波动方程的求逆估算剪切波速度。最终的2-D剪切波速度图是通过对来自相反行进方向的估计值进行加权平均而构建的。明胶浓度分别为5％，7％和9％的体模的剪切波速度结果为1.52？ 0.10 m / s，1.86？ 0.10 m / s和2.37 ??分别为0.15 m / s，这与通过其他三种常规方法以及使用商用纹理分析仪进行的压缩测试得出的估算值一致。结果表明，该方法能够重建包含体模的二维速度图，其图像质量和方差可与常规方法相比。给出了进一步工作的建议。

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