High-speed, plane-wave ultrasound imaging for Lagrangian particle tracking

需要一个能够平面波成像的超快速超声系统来支持几个平行研究项目，这些项目涉及使用拉格朗日粒子跟踪研究复杂流体动力学。拉格朗日路径信息使我们能够计算随时间变化的压力场，估计夹带，并适当地表征密集悬浮液中的相互作用。通常，流体物理是通过光学技术测量的，使用激光和相机，这些技术被不透明或半透明的测试截面和流体所抑制。超声成像不受同样的限制，并开辟了一个新的实验范围，包括体内流动跟踪和流体结构相互作用。然而，市场上的大多数超声系统都被限制在200Hz以下的帧率。通过使用平面波技术将帧率大幅提高到100,000Hz，获得所要求的系统将解除我们流体动力学实验的任何限制。新系统将能够通过复杂和灵活的几何形状来研究高雷诺数、多相流。作为加拿大第一个使用这种最先进的超声系统的工程实验室之一，我们有信心将自己定位为全球领先的流体动力学研究人员。因此，考虑到现在拉格朗日数据重建的快速变化，这里所要求的超声系统将有可能产生重大而持久的影响。

An ultra-fast ultrasound system capable of plane-wave imaging is requested in support of several parallel research projects pertaining to the investigation of complex fluid dynamics using Lagrangian particle tracking. Lagrangian pathline information enables us to calculate time-varying pressure fields, estimate entrainment, and properly characterize interactions within dense suspensions. Typically, fluid physics is measured via optical techniques using a laser and cameras that are inhibited by opaque or translucent test-sections and fluids. Ultrasound imaging does not suffer from the same limitation and opens a new range of experiments, including in vivo flow tracking and fluid-structure interactions. However, the majority of the ultrasound systems on the market are limited to frame rates below 200Hz. Acquisition of the requested system will lift any restrictions from our fluid dynamic experiments by drastically increasing the frame rate to 100,000Hz using plane-wave technology. The new system will enable the investigation of high Reynolds number, multi-phase flows through complex and flexible geometries. As one of the first engineering laboratories in Canada to work with this state-of-the-art ultrasound system we are confident that we will position ourselves amongst leading fluid dynamics researchers around the globe. Therefore, considering the rapid changes in Lagrangian data reconstruction occurring now, an opportunity for significant and lasting impact will be possible with the ultrasound system requested here.