title: ÐÐ²ÑÑÐ»Ð¾Ð¹Ð½Ð°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ Ð³Ð¾Ð»Ð¾Ð²Ñ ÑÐµÐ»Ð¾Ð²ÐµÐºÐ°
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: A two-layer model of the human head
Creators: name: Ð§ÑÐµÐ², ÐÐ°ÑÐ¸Ð»Ð¸Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2024
Subjects: Ð¼ÐµÑÐ¾Ð´ ÐÐ¾Ð½ÑÐµ-ÐÐ°ÑÐ»Ð¾
ÑÑÐ¾Ñ Ð°ÑÑÐ¸ÑÐµÑÐºÐ¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ðµ Ð¿ÐµÑÐµÐ½Ð¾ÑÐ°
Ð¾Ð±ÑÐ°ÑÐ½Ð¾Ðµ ÑÐ°ÑÑÐµÑÐ½Ð¸Ðµ
Ð¼Ð½Ð¾Ð³Ð¾ÐºÑÐ°ÑÐ½Ð¾Ðµ ÑÐ°ÑÑÐµÑÐ½Ð¸Ðµ
Ð¼Ð½Ð¾Ð³Ð¾ÑÐ»Ð¾Ð¹Ð½ÑÐµ Ð±Ð¸Ð¾Ð¼Ð¾Ð´ÐµÐ»Ð¸
ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½Ñ ÑÐ°ÑÑÐµÑÐ½Ð¸Ñ
ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½Ñ Ð¿Ð¾Ð³Ð»Ð¾ÑÐµÐ½Ð¸Ñ
Monte-Carlo method
radiation transfer equation
multiple scattering
stochastic modeling
backscattering
scattering
multi-layer bio-models
scattering coefficient
adsorption coefficient

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description: The paper considers the problem of optical radiation transport in strongly inhomogeneous random media. The main object of study is biomodels in the form of layers of finite thickness. The intensity of backscattering of near-infrared radiation is calculated for a two-layer model of a highly inhomogeneous medium, which can be regarded as a skull-brain biotissue system. Based on the Bethe-Solpeter equation, the procedure of multiple scattering modeling by the Monte Carlo method for a two-layer random inhomogeneous medium is described. The Henyey-Greenstein phase function is used as an indicatrix of single scattering. The dependences of the backscattering intensity on the distance along the head surface between the radiation source and the receiver and on the scattering angle were calculated. The type of these dependences turned out to be sensitive to changes in such parameters of the system as the anisotropy of the scattering indicatrix, the thickness of layers, and the wavelength of laser radiation. This feature can be used in medical diagnostics. An alternative approach to the calculation of the probability density distribution of the free path length of a photon is proposed.