Measurements of optical parameters of phantom solution and bulk animal tissues ex vivo at 650 nm

Ping Sun; Yu Wang; Jian Liu

doi:10.1117/12.822853

18 February 2009 Measurements of optical parameters of phantom solution and bulk animal tissues ex vivo at 650 nm

Ping Sun, Yu Wang, Jian Liu

Proceedings Volume 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications; 72760K (2009) https://doi.org/10.1117/12.822853
Event: Photonics and Optoelectronics Meetings, 2008, Wuhan, China

Abstract

Optical parameters of biological tissues, including absorption coefficient (μ_a), reduced scattering coefficient (μ_s') or scattering coefficient (μ_s), anisotropy factor (g) and refractive index (n) are investigated extensively and systemically at wavelength of 650 nm. Intralipid solution was selected to be the tissue phantom in order to test the validity of measurements. Considering the factors of fiber orientation and haemoglobin content, we chose some fresh bulk animal tissues in vitro which were bovine adipose, bovine muscle, porcine adipose, porcine muscle, porcine kidney, porcine liver, mutton and chicken breast. The basic assumption is that in vitro samples are a reasonable representation of the in vivo situation. We have gained numbers of experimental data of Intralipid and some tissues. Particularly, we have set up the close relationships among six optical parameters involving μ_a, μ_s', μ_s, g, n and μ_t. The experimental results show that for animal tissues, μ_a, μs' or μ_s and n rely deeply on muscle fiber orientations. Both of μs and μ_t range from 10mm^-1 to 20mm^-1. μ_a ranges from 10^-2 mm^-1 to 10^-3 mm^-1 and g from 0.95 to 0.99. The results of this study will be helpful in further understanding of optical properties of tissues.

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Ping Sun, Yu Wang, and Jian Liu "Measurements of optical parameters of phantom solution and bulk animal tissues ex vivo at 650 nm", Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 72760K (18 February 2009); https://doi.org/10.1117/12.822853

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KEYWORDS

Tissues

Tissue optics

Scattering

Refractive index

Diffuse reflectance spectroscopy

Optical properties

Absorption

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