...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Biomechanics >MR MEASUREMENT AND NUMERICAL SIMULATION OF STEADY FLOW IN AN END-TO-SIDE ANASTOMOSIS MODEL
【24h】

MR MEASUREMENT AND NUMERICAL SIMULATION OF STEADY FLOW IN AN END-TO-SIDE ANASTOMOSIS MODEL

机译：端到端吻合模型中稳态流动的MR测量和数值模拟

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

Magnetic resonance phase contrast velocity imaging ('MR PC velocimetry') is a powerful tool for measuring blood velocity. While it has been demonstrated that MR PC velocimetry can accurately measure velocity profiles in simple, unidirectional flows, errors can arise when measuring the more complex, multidirectional flows of clinical importance. In this work, we have compared MR PC velocity measurements with numerical simulations of steady Bow in a physiologically relevant model of an end-to-side anastomosis, which produces many of the complex Bow features expected in vivo. MR PC velocity profiles, measured using both 2D and 3D pulse sequences, showed very good agreement with numerically computed profiles, although at 2D PC data showed slightly larger errors than the 3D PC data in regions of high accelerations and oblique Row, likely due to displacement artifacts. We conclude that, under ideal conditions, MR phase contrast velocimetry can measure complex flow patterns to within 15% accuracy, but that care should be taken when using 2D pulse sequences to measure such complex flows. [References: 16]
机译：磁共振相衬速度成像（“ MR PC测速法”）是测量血流速度的强大工具。尽管已经证明MR PC测速仪可以在简单的单向流中准确测量速度分布，但是在测量具有临床重要性的更复杂的多向流时会出现误差。在这项工作中，我们已将MR PC速度测量结果与端对端吻合的生理相关模型中的稳定Bow的数值模拟进行了比较，该模型在体内产生了许多复杂的Bow特征。使用2D和3D脉冲序列测量的MR PC速度曲线显示出与数值计算曲线非常吻合，尽管在2D PC数据中，在高加速度和倾斜行区域中的误差略大于3D PC数据，这可能是由于位移引起的文物。我们得出的结论是，在理想条件下，MR相衬测速仪可以将复杂的流型测量到15％的精度内，但是在使用2D脉冲序列测量此类复杂流时应格外小心。 [参考：16]

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