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We have recently developed a novel contrast-based micro echo particle imaging technique (Micro-EPIV) for non-invasively measuring multi-component flow vectors and flow-induced shear stress in microscale tube flow or in vivo small blood flows. In this study, the measuring principle and system characterization are first introduced. Then, the Micro-EPIV technique is applied to examine flows in several...
This paper presents a high-resolution microscale ultrasonic particle image velocimetry technique (termed as Micro-EPIV) for measuring multi-component velocity vectors in microscale opaque flows such as blood and biofluid flow in microvessel. The method was tested by in vitro flow imaging and in vivo small animal blood flow imaging studies. The bioflow and blood flow were seeded with ultrasound contrast...
We have recently developed a novel contrast-based ultrasonic particle imaging technique (Echo PIV) for multi-dimensional blood flow imaging. In the technique, the quality of vectors is important for quantitative blood flow imaging. Here we introduce an algorithm for vectors correction by filtering in frequency domain and applying continuity equation. The algorithm was tested in the Echo PIV imaging...
We have recently developed a novel contrast-based ultrasonic particle image velocimetry (Echo PIV) technique to measure multi-component velocity vectors in opaque flows. In the technique, ultrasound contrast microbubbles are used as flow tracers, and digitally acquired backscattered RF-data are used with custom velocimetry analysis to obtain velocity vectors. The technique has been shown as useful...
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