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In this paper, we report the development of miniaturized forward-looking transducers for microbubble-mediated intravascular ultrasound-enhanced thrombolysis (UET). UET has shown its efficacy for thrombo-occlusive disease by enhancing penetration of thrombolytic drugs into clots, reducing the required dose. In this study, we adopted a previously-developed forward-looking, stacked type transducer for...
Carbon-based materials have been considered as an efficient light-absorption component of film-type laser ultrasound transducers. Our previously designed laser ultrasound patch composed of candle soot nanoparticles and polydimethylsiloxane (CS/PDMS) composites showed high photoacoustic transducer efficiency than other carbon-based composites. In this study, we demonstrate that the carbon volume fraction...
A laser-generated-focused ultrasound (LGFU) transducer generates high-pressure (up to 20 MPa), high-frequency (>10 MHz) shock waves with a tight focal spot. In this work, we aim to demonstrate the feasibility of using LGFU transducers for sonothrombolysis in vitro. A carbon black LGFU transducer was designed, fabricated and characterized. The prototyped LGFU was applied with in-vitro thrombolysis...
The technology of non-contact and non-destructive detection of acoustic and ultrasound waveforms play an importance role in industrial application which make it possible to measure acoustic and ultrasonic in hostile environments, such as high temperature circumstance or long distance from test structure. The conventional Optical interferometer cannot detect rough surfaces accurately due to the noise...
As a novel composite material for laser ultrasound transducer, candle soot nanoparticles polydimethylsiloxane (CSPs-PDMS) has been demonstrated to generate high frequency, broadband, and high-amplitude ultrasound waves. In this study, we investigated the mechanism of the high-optoacoustic conversion efficiency exhibited by the composite. A thermal-acoustic coupling model was proposed for analyzing...
Dose uniformity is one of the important factors in evaluation of microfeeding of fine powders. This paper describes a method for metering and dispensing the fine metal powders. The principle of the powder dispensing of digitalization is distinct from ultrasonic microfeeding, and it not only achieved continuous feeding, but also guaranteed dose uniformity. To avoid the relative movement and with a...
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