Presidential Investigator Award

这项研究致力于在生物工程中应用超声波的传感器和测量系统。研究的目标是开发一种利用波导实现聚焦机械可调的超声测量系统。可调焦距允许根据声场的物理轮廓控制空间分辨率和穿透深度。通过控制这些参数，该测量系统可用于研究不同大小、形状和密度的生物系统。在对波导材料进行初步研究之后，将设计、制造并与换能器耦合。他们的光束轮廓将被测量，并与预测进行比较。将进行实验室测试，以演示该系统在血液流量测量和软组织动态表征方面的应用。

This research addresses transducers and measurement systems using ultrasound for applications in bioengineering. The research goal is the development of an ultrasonic measurement system with a mechanically adjustable focus, achieved by use of a waveguide. The adjustable focus allows control of spatial resolution and penetration depth based on the physical profile of the acoustic field. By controlling these parameters, the measurement system may be used to investigate biological systems of variable size, shape, and density. After an initial study of waveguide materials, potential waveguides will be designed, fabricated, and coupled with transducers. Their beam profiles will be measured and compared with predictions. Laboratory tests will be developed to demonstrate application of the system to blood flow measurement and dynamic characterization of soft tissue.