Acoustic High-Speed Imaging of Cavitation Microbubbles with Plane Waves
* Presenting author
Abstract:
Plane wave imaging is an acoustic technique that offers highest imaging frame rates. The only limitation on the frame rate is given by the speed of sound in the imaging medium and the imaging depth. Here a plane wave imaging setup operating in the megahertz acoustic range is shown to achieve frame rates of up to 50 kHz. It is employed to measure the dynamics of a laser induced cavitation bubble that is generated in an optically transparent tissue-mimicking material. The challenges here are the small bubble size of a few hundreds of micrometers and its fast dynamics that take part in less than a hundred microseconds. The acoustic imaging is benchmarked with simultaneously conducted optical high-speed imaging of the bubble dynamics. It is shown that the plane wave imaging shows accurate results for spherical bubbles and can be applied as non-destructive imaging technique for example in tissue or other optically nontransparent media.