REVIEW OF APPROACHES TO DESCRIPTION OF LIGHT SCATTERING IN BIOLOGICAL TISSUE

2020 ◽  
Vol 3 ◽  
pp. 131-139
Author(s):  
I.O. KOZLOV
Keyword(s):  
Light Scattering ◽  
Diffusion Approximation ◽  
Biological Tissue ◽  
Transfer Equation ◽  
Radiation Transfer ◽  
Biological Tissues ◽  
Single Scattering ◽  
Ladder Approximation ◽  
Radiation Transfer Equation ◽  
Small Perturbation Method

The article discusses various approaches to modeling the processes of light scattering in biological tissues. The analytical radiation transfer equation, the Tversky approach, the Bethe–Salpeter equation, and the ladder approximation are considered. For cases of single scattering, the Kubelka–Munk approach, the diffusion approximation, and the small perturbation method are presented. The mathematical principles of the considered methods are disclosed in the paper and the limits of applicability in solving the radiation transfer equation are analyzed.

Analysis on the Applicability of Diffusion Approximation for the Radiative Transfer Equation with Compton Scattering

2016 ◽  
Vol 685 ◽  
pp. 60-64
Author(s):  
Ivan Yarovenko
Keyword(s):  
Radiative Transfer ◽  
Compton Scattering ◽  
Diffusion Approximation ◽  
Transfer Equation ◽  
Radiation Transfer ◽  
Radiative Transfer Equation ◽  
Radiation Transfer Equation ◽  
Numerical Examples

This paper deals with a diffusion approximation for the radiation transfer equation which takes into account Сompton scattering on electrons. An analytical and a numerical examples are used to compare the solution of radiation transfer equation with its diffusion approximation.

scholarly journals Численное моделирование миграции фотонов в однородных и неоднородных цилиндрических фантомах

2020 ◽  
Vol 128 (6) ◽  
pp. 832
Author(s):  
А.Ю. Потлов ◽  
С.В. Фролов ◽  
С.Г. Проскурин
Keyword(s):  
Radiation Transfer ◽  
Biological Tissues ◽  
Photon Density ◽  
Radiation Transfer Equation ◽  
Scattering Media ◽  
Soft Biological Tissues ◽  
Photon Diffusion ◽  
Low Coherence ◽  
The Brain ◽  
Pulsed Irradiation

The specific features of photon diffusion of low-coherence pulsed irradiation in phantoms of soft biological tissues (blood-saturated tissues of the brain, breast, etc.) are described. The results of photon migration simulation using the Diffusion Approximation to the Radiation Transfer Equation (RTE) are compared with ones of the Monte Carlo simulations. It has been confirmed that the Photon Density Normalized Maximum (PDNM) moves towards the center of the investigated object in case of relatively uniform and strongly scattering media. In the presence of inhomogeneities, type of the PDNM motion changes drastically. Presence of an absorbing inhomogeneity in the medium directs trajectory of the PDNM motion of towards the point symmetric to the inhomogeneity relative to the geometric center of the investigated object. In case of scattering the PDNM moves toward the direction of the center of the scattering inhomogeneity.

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