Haemodynamics and blood flow measured using ultrasound imaging
Haemodynamics and blood flow measured using ultrasound imaging
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DOI：
10.1243/09544119jeim572
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发表时间：
2010-01-01
期刊：
影响因子：
1.8
通讯作者：
Hoskins, P. R.
中科院分区：
文献类型：
--
作者：
Hoskins, P. R.
可以使用超声系统进行动脉中的血液动力学现象的可视化和与之相关的测量。大多数超声技术依赖于从单个部位获取的血液速度的简单测量，例如用于评估由动脉狭窄引起的管腔减小程度的峰值收缩期速度。实时二维（2D）流场可视化是可能的，使用几种方法，如彩色流，血流成像，和回声粒子图像测速;这些应用程序中的流场检查在患病的动脉和心脏腔室。已经描述了三维（3D）和四维超声系统。这些已被用来提供2D速度分布数据的体积流量的估计。然而，它们在血液动力学评价方面受到限制，因为它们仅提供速度的一个分量。所有七个组件（三个空间，三个速度和一个时间）的提供是可能的使用图像引导的inodelling，其中3D超声与计算流体动力学相结合。该方法还允许估计湍流数据和相关量，如壁面剪应力。
Visualization of, and measurements related to, haemodynamic phenomena in arteries may be made using ultrasound systems. Most ultrasound technology relies on simple measurements of blood velocity taken from a single site, such as the peak systolic velocity for assessment of the degree of lumen reduction caused by an arterial stenosis. Real-time two-dimensional (2D) flow field visualization is possible using several methods, such as colour flow, blood flow imaging, and echo particle image velocimetry; these have applications in the examination of the flow field in diseased arteries and in heart chambers. Three-dimensional (3D) and four-dimensional ultrasound systems have been described. These have been used to provide 2D velocity profile data for the estimation of volumetric flow. However, they are limited for haemodynamic evaluation in that they provide only one component of the velocity. The provision of all seven components (three space, three velocity, and one time) is possible using image-guided inodelling, in which 3D ultrasound is combined with computational fluid dynamics. This method also allows estimation Of turbulence data and of relevant quantities Such as the wall shear stress.