Photoacoustic correlation technique for low-speed flow measurement

Sung Liang Chen, Tao Ling, Sheng Wen Huang, Hyoung Won Baac, Yu-Chung Chang, L. Jay Guo

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)


A photoacoustic correlation spectroscopy (PACS) technique was proposed for the first time. This technique is inspired by its optical counterpart-the fluorescence correlation spectroscopy (FCS), which is widely used in the characterization of the dynamics of fluorescent species. The fluorescence intensity is measured in FCS while the acoustic signals are detected in PACS. To proof of concept, we demonstrated the flow measurement of light-absorbing beads probed by a pulsed laser. A PACS system with temporal resolution of 0.8 sec was built. Polymer microring resonators were used to detect the photoacoustic signals, which were then signal processed and used to obtain the autocorrelation curves. Flow speeds ranging from 249 to 15.1 μm/s with corresponding flow time from 4.42 to 72.5 sec were measured. The capability of low-speed flow measurement can potentially be used for detecting blood flow in relatively deep capillaries in biological tissues. Moreover, similar to FCS, PACS may have many potential applications in studying the dynamics of photoacoustic beads.

主出版物標題Photons Plus Ultrasound
主出版物子標題Imaging and Sensing 2010
出版狀態Published - 2010 五月 3
事件Photons Plus Ultrasound: Imaging and Sensing 2010 - San Francisco, CA, United States
持續時間: 2010 一月 242010 一月 26


OtherPhotons Plus Ultrasound: Imaging and Sensing 2010
國家United States
城市San Francisco, CA

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

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    Chen, S. L., Ling, T., Huang, S. W., Baac, H. W., Chang, Y-C., & Guo, L. J. (2010). Photoacoustic correlation technique for low-speed flow measurement. 於 Photons Plus Ultrasound: Imaging and Sensing 2010 (卷 7564). [75642I]