Photoacoustic Doppler flowmetry of whole blood by pulsed laser
2012 5th International Conference on Biomedical Engineering and Informatics, BMEI 2012
In order to measure the flow velocity of whole blood in vessel mimicking tube inside optically scattering media, a 1064nm pulsed laser with the repetition rate of 10Hz was used as a pumping source to generate photoacoustic doppler signal. A 75MHz spherical focus ultrasound transducer was used to collect time-domain photoacoustic doppler signal successively. The flow velocity of whole blood was calculated by time-domain correlation algorithm. The whole blood was driven by a syringe pump. The measured velocity linearly changed in 0.5,1.0,1.5mm/s, respectively. The experimental results demonstrated the feasibility of using pulsed laser and time-domain correlation algorithm in the flowmetry of whole blood with low flowing velocity inside optically scattering media. © 2012 IEEE.
Lu, T., Wang, W., & Xu, H. (2012). Photoacoustic Doppler flowmetry of whole blood by pulsed laser. 2012 5th International Conference on Biomedical Engineering and Informatics, BMEI 2012, 769-771. https://doi.org/10.1109/BMEI.2012.6512907