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首页> 外文会议>BMEI 2012;International Conference on Biomedical Engineering and Informatics >Photoacoustic Doppler flowmetry of whole blood by pulsed laser
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Photoacoustic Doppler flowmetry of whole blood by pulsed laser

机译：脉冲激光全血光声多普勒血流仪

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摘要

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.
机译：为了测量光散射介质内部血管模拟管中全血的流速，使用重复频率为10Hz的1064nm脉冲激光作为泵浦源，以产生光声多普勒信号。 75MHz球形聚焦超声换能器被用来连续收集时域光声多普勒信号。通过时域相关算法计算全血流速。全血由注射泵驱动。测得的速度分别以0.5、1.0、1.5mm / s线性变化。实验结果证明了在光学散射介质内部以低流速进行全血流式测量时，采用脉冲激光和时域相关算法的可行性。

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