Simultaneous recovery of a full set of optical properties in turbid media using incomplete P5 approximation to CW radiance

Optics Letters
Lingling LiuFeng Gao

Abstract

Traditional methods for determining the optical properties of turbid media are implemented in diffusive regimes, where the scattering coefficient μs and anisotropy factor g are inseparable due to the similarity relation for anisotropy scattering. Determining μs and g in addition to the absorption coefficient μa normally requires measurements using thin samples or media of low scattering, which are inappropriate for in vivo applications. In this work, we propose an analytical method to simultaneously recover μa, μs, and g based on the incomplete P5 approximation (P5in) to the continuous wave (CW) radiative transport equation. The proposed method was verified using both simulated and experimental data with the relative errors less than 6.6%, 11.6%, and 8.2% for μa ranging 0.0071-0.0168  mm-1, μs ranging 2.35-8.47  mm-1, and g ranging 0.61-0.81, respectively. Since the P5in-based radiance method can be easily implemented with several measurements, it is expected to be used for recovering a full set of the optical properties in vivo.

References

May 21, 2005·Physical Review Letters·S MenonR Grobe
Nov 1, 1991·Applied Optics·H J van StaverenM J van Gemert
Apr 27, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·André Liemert, Alwin Kienle
Dec 14, 2011·Nature Communications·Edward VitkinLev T Perelman
May 15, 2013·Physics in Medicine and Biology·Steven L Jacques

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