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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Decorrelation characteristics of transverse blood flow along an intravascular array catheter
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Decorrelation characteristics of transverse blood flow along an intravascular array catheter

机译：沿血管内阵列导管的横向血流的去相关特征

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摘要

In recent years, a new method to measure transverse blood flow based on the decorrelation of radio frequency (RF) signals has been introduced. In this paper, we investigated the decorrelation characteristics of transverse blood flow measurement using an intravascular ultrasound (IVUS) array catheter by means of computer modeling. Blood was simulated as a collection of randomly located point scatterers. Moving this scattering medium transversally across the acoustical beam represented flow. First-order statistics were evaluated, and the signal-to-noise ratio from the signals was measured. The correlation coefficient method was used to present the results. The decorrelation patterns for RF and for RF-envelope signals were studied. The decorrelation patterns from the RF signals were in good agreement with those obtained from theoretical beam profiles. This agreement suggests that the decorrelation properties of an IVUS array catheter for measuring quantitative transverse blood flow can be assessed by measuring the ultrasound beam. A line of point scatterers, moved transversally across the acoustical beam (line spread function), can determine this decorrelation behaviour.
机译：近年来，已经引入了一种基于射频（RF）信号的去相关性来测量横向血流的新方法。在本文中，我们通过计算机建模研究了使用血管内超声（IVUS）阵列导管测量横向血流的去相关特性。将血液模拟为随机分布的点散射体的集合。沿声束横向移动此散射介质表示流。评估一阶统计量，并测量信号的信噪比。相关系数法用来表示结果。研究了射频和射频包络信号的去相关模式。 RF信号的去相关模式与从理论波束轮廓获得的去相关模式非常吻合。该协议表明，可以通过测量超声束来评估用于测量定量横向血流的IVUS阵列导管的去相关特性。在声束上横向移动的点散射线（线扩展函数）可以确定这种去相关行为。

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