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

用于拉格朗日粒子跟踪的高速平面波超声成像

• 批准号: RTI-2020-00154
• 负责人: Rival, David
• 金额: $ 10.85万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693650
• 关键词: speed; plane; wave; ultrasound; imaging

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.

一个超快的超声系统能够平面波成像的要求，在支持几个平行的研究项目有关的复杂的流体动力学的调查，使用拉格朗日粒子跟踪。拉格朗日轨迹信息使我们能够计算随时间变化的压力场，估计夹带，并正确表征密集悬浮液内的相互作用。通常，流体物理是通过光学技术使用激光和摄像机进行测量的，这些技术受到不透明或半透明测试部分和流体的抑制。超声成像没有受到同样的限制，并开辟了一个新的实验范围，包括在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限于低于200Hz的帧速率。获得所要求的系统将解除我们的流体动力学实验的任何限制，通过使用平面波技术将帧速率大幅提高到100，000Hz。新系统将能够通过复杂和灵活的几何形状研究高雷诺数、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，我们相信我们将在地球仪的领先流体动力学研究人员中占据一席之地。因此，考虑到现在拉格朗日数据重建的快速变化，这里要求的超声系统将有可能产生重大和持久的影响。