Photoacoustic doppler effect from flowing small light-absorbing particles

被引:123
作者
Fang, Hui [1 ]
Maslov, Konstantin [1 ]
Wang, Lihong V. [1 ]
机构
[1] Washington Univ, Opt Imaging Lab, Dept Biomed Engn, St Louis, MO 63130 USA
关键词
D O I
10.1103/PhysRevLett.99.184501
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
From the flow of a suspension of micrometer-scale carbon particles, the photoacoustic Doppler shift is observed. As predicted theoretically, the observed Doppler shift equals half of that in Doppler ultrasound and does not depend on the direction of laser illumination. This new physical phenomenon provides a basis for developing photoacoustic Doppler flowmetry, which can potentially be used for detecting fluid flow in optically scattering media and especially low-speed blood flow of relatively deep microcirculation in biological tissue.
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页数:4
相关论文
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