Experimental determination of optical properties in turbid medium by TCSPC technique

Dongli Qin; Huijuan Zhao; Yukari Tanikawa; Feng Gao

doi:10.1117/12.697860

13 February 2007 Experimental determination of optical properties in turbid medium by TCSPC technique

Dongli Qin, Huijuan Zhao, Yukari Tanikawa, Feng Gao

Proceedings Volume 6434, Optical Tomography and Spectroscopy of Tissue VII; 64342E (2007) https://doi.org/10.1117/12.697860
Event: SPIE BiOS, 2007, San Jose, California, United States

Abstract

In this article, we briefly described a time-correlated single photon counting (TCSPC) system specifically designed for extracting the optical properties in turbid medium. This system was evaluated by use of two sets of liquid tissue-simulating phantoms containing different concentrations of Intralipid-10% as scatters and India ink as absorbers. With the distribution of times of flight (DTOF) of photons measured by the TCSPC system, some featured parameters, such as the mean time of flight and the variance of DTOF were calculated. Based on these parameters, we developed a simple and fast method to obtain the absorption coefficient &mgr;_a and reduced scattering coefficient &mgr;_s' of the turbid medium. Furthermore, the accuracy of the method was validated using the Monte Carlo simulations. It was found that the optical properties could be extracted with this method, which was much faster than the conventional curve-fitting procedure. Our method could be useful in on-line monitoring of optical properties and of the oxygen saturation (SaO₂) in forearm muscle.

Citation Download Citation

Dongli Qin, Huijuan Zhao, Yukari Tanikawa, and Feng Gao "Experimental determination of optical properties in turbid medium by TCSPC technique", Proc. SPIE 6434, Optical Tomography and Spectroscopy of Tissue VII, 64342E (13 February 2007); https://doi.org/10.1117/12.697860

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