Computation of flow pressure fields from magnetic resonance velocity mapping
Computation of flow pressure fields from magnetic resonance velocity mapping
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DOI：
10.1002/mrm.1910360404
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发表时间：
1996-10-01
影响因子：
3.3
通讯作者：
Firmin, DN
中科院分区：
文献类型：
--
作者：
Yang, GZ;Kilner, PJ;Firmin, DN
磁共振相速度成像在获取体内多向血流信息方面具有无可比拟的能力。在这项研究中，作者着手利用电影磁共振速度数据推导出加速度的空间和时间分量，从而推导出流场中压力的差异。采用了一种基于不可压缩牛顿流体的Navier-Stokes方程的高效数值算法。用体外流动模型对计算方法进行了验证。这项工作旨在有助于更好地理解心血管动力学，并为研究与正常和受损心血管功能相关的脉动压力/流量关系奠定基础。
Magnetic resonance phase velocity mapping has unrivalled capacities for acquiring in vivo multi-directional blood flow information. In this study, the authors set out to derive both spatial and temporal components of acceleration, and hence differences of pressure in a flow field using cine magnetic resonance velocity data. An efficient numerical algorithm based on the Navier-Stokes equations for incompressible Newtonian fluid was used. The computational approach was validated with in vitro flow phantoms. This work aims to contribute to a better understanding of cardiovascular dynamics and to serve as a basis for investigating pulsatile pressure/flow relationships associated with normal and impaired cardiovascular function.