Analysis of blood flow and pulse wave propagation in carotid artery for diagnosis of cerebrovascular system

本文利用一套实现几千赫兹帧频率超声成像的定制系统，分析了局部脉搏波在脑血管系统的传播和反射。我们发展了一种分别测量颈动脉前向波和反射波的局部传播速度的方法，成功地识别了前向波和反射波。此外，为了对血流动力学进行详细的分析，成功地对血液颗粒的超声回波进行了可视化，并对血液颗粒的超声回波进行了空间频率分析，实现了流线的可视化。

In the present study, the regional pulse wave propagation and reflection of pulse wave from the cerebrovascular system were analyzed using a custom system which realizes ultrasonic imaging at a frame rate of a few thousands Hz. We have developed a method for measurement of regional propagation velocities of forward and reflected waves individually in the carotid artery, the forward and reflected waves were identified successfully. Furthermore, for detailed analysis of blood flow dynamics, ultrasonic echoes from blood particles were visualized successfully, and the stream lines were also visualized by spatial frequency analysis of ultrasonic echoes from blood particles.