...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ultrasonics >Ultrasound speckle tracking for radial, longitudinal and circumferential strain estimation of the carotid artery - An in vitro validation via sonomicrometry using clinical and high-frequency ultrasound
【24h】

Ultrasound speckle tracking for radial, longitudinal and circumferential strain estimation of the carotid artery - An in vitro validation via sonomicrometry using clinical and high-frequency ultrasound

机译：超声散斑跟踪，可估计颈动脉的径向，纵向和周向应变-使用临床和高频超声通过体测法进行体外验证

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ultrasound speckle tracking for carotid strain assessment has in the past decade gained interest in studies of arterial stiffness and cardiovascular diseases. The aim of this study was to validate and directly contrast carotid strain assessment by speckle tracking applied on clinical and high-frequency ultrasound images in vitro. Four polyvinyl alcohol phantoms mimicking the carotid artery were constructed with different mechanical properties and connected to a pump generating carotid flow profiles. Gray-scale ultrasound long-and short-axis images of the phantoms were obtained using a standard clinical ultrasound system, Vivid 7 (GE Healthcare, Horten, Norway) and a high-frequency ultrasound system, Vevo 2100 (FUJIFILM, VisualSonics, Toronto, Canada) with linear-array transducers (12L / MS250). Radial, longitudinal and circumferential strains were estimated using an in-house speckle tracking algorithm and compared with reference strain acquired by sonomicrometry. Overall, the estimated strain corresponded well with the reference strain. The correlation between estimated peak strain in clinical ultrasound images and reference strain was 0.91 (p < 0.001) for radial strain, 0.73 (p < 0.001) for longitudinal strain and 0.90 (p < 0.001) for circumferential strain and for high-frequency ultrasound images 0.95 (p < 0.001) for radial strain, 0.93 (p < 0.001) for longitudinal strain and 0.90 (p < 0.001) for circumferential strain. A significant larger bias and root mean square error was found for circumferential strain estimation on clinical ultrasound images compared to high frequency ultrasound images, but no significant difference in bias and root mean square error was found for radial and longitudinal strain when comparing estimation on clinical and high-frequency ultrasound images. The agreement between sonomicrometry and speckle tracking demonstrates that carotid strain assessment by ultrasound speckle tracking is feasible. (C) 2014 The Authors. Published by Elsevier B.V.
机译：在过去的十年中，用于颈动脉应变评估的超声斑点追踪技术已引起对动脉僵硬度和心血管疾病研究的兴趣。这项研究的目的是通过斑点跟踪在体外和临床超声图像上验证并直接对比颈动脉应变评估。构造了四个模拟颈动脉的聚乙烯醇模型，它们具有不同的机械性能，并连接到生成颈动脉血流曲线的泵上。使用标准临床超声系统Vivid 7（GE Healthcare，霍滕，挪威）和高频超声系统Vevo 2100（FUJIFILM，VisualSonics，多伦多，加拿大）获得幻像的灰度超声长轴和短轴图像。加拿大）和线性阵列传感器（12升/ MS250）。使用内部斑点跟踪算法估算径向，纵向和圆周应变，并将其与通过体测法获得的参考应变进行比较。总体而言，估计的应变与参考应变非常吻合。临床超声图像中估计峰值应变与参考应变之间的相关性，径向应变为0.91（p <0.001），纵向应变为0.73（p <0.001），圆周应变和高频超声图像为0.90（p <0.001）径向应变为0.95（p <0.001），纵向应变为0.93（p <0.001），圆周应变为0.90（p <0.001）。与高频超声图像相比，在临床超声图像的圆周应变估计中发现了较大的偏差和均方根误差，但在比较临床和临床估计时，径向和纵向应变的偏差和均方根误差均无显着差异。高频超声图像。体测和斑点跟踪之间的一致性表明，通过超声斑点跟踪评估颈动脉应变是可行的。 （C）2014作者。由Elsevier B.V.发布

著录项

相似文献

  • 外文文献
  • 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