Steinman D A
Imaging Research Labs, John P. Robarts Research Institute, P.O. Box 5015, 100 Perth Drive, London, Canada.
J Biomech. 2000 May;33(5):623-8. doi: 10.1016/s0021-9290(99)00205-5.
Improvements in computer hardware and software have made it possible to model pulsatile blood flow in realistic arterial geometries. Such studies produce enormous amounts of velocity data, which are often difficult to interpret and communicate using traditional contour and/or vector field plots. Inspired by in vitro flow visualization techniques such as particle image velocimetry (PIV), we describe a simple and effective method for visualizing periodic three-dimensional velocity data, based on the subdivision and sequential display of computed particle trajectories. Analogous to a PIV experiment, the length and spacing of such simulated particle pathlines are controlled by user-specified shutter-speed and frame rate variables. Strategies for color-coding pathlines to highlight important hemodynamic features such as recirculation zones and branch flow division are presented.
计算机硬件和软件的进步使得在逼真的动脉几何形状中对脉动血流进行建模成为可能。此类研究产生了大量的速度数据，而使用传统的等值线图和/或矢量场图往往难以解释和传达这些数据。受体外流动可视化技术（如粒子图像测速技术（PIV））的启发，我们描述了一种简单有效的方法，用于可视化周期性三维速度数据，该方法基于对计算出的粒子轨迹进行细分并顺序显示。类似于PIV实验，此类模拟粒子迹线的长度和间距由用户指定的快门速度和帧率变量控制。本文还介绍了对迹线进行颜色编码以突出重要血流动力学特征（如回流区和分支血流分配）的策略。
