Anisotropic effects in highly scattering media.
نویسندگان
چکیده
In this paper, we study anisotropic scattering and light propagation models applicable to diffuse optical tomography. We propose a model for anisotropic scattering in the radiative transfer framework and derive the corresponding anisotropic diffusion model. To verify the anisotropic diffusion model, we consider the case of a simple anisotropic scattering model also presentable within the diffusion approximation. For numerical computations, we present a three-dimensional (3D) anisotropic Monte Carlo model and 2D finite element and boundary element solutions of the anisotropic diffusion model, and compare the results of the simulations.
منابع مشابه
Coherent backscattering enhancement in highly anisotropically scattering media Numerical solution
The problem of coherent backscattering enhancement in media with highly anisotropic scattering is considered within the scalar wave theory. A stable computational algorithm, suitable for the media of finite thickness, is formulated. Numerical simulations are performed, and the results are presented and discussed. & 2011 Elsevier Ltd. All rights reserved.
متن کاملConservation of asymmetry factor in phase function discretization for radiative transfer analysis in anisotropic scattering media
0017-9310/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.ijheatmasstransfer.2011.11.009 ⇑ Corresponding author. E-mail address: [email protected] (Z. Guo). A new phase function normalization technique is developed for use with anisotropic scattering media and is applied to the conventional discrete-ordinates method. The new approach is shown to ensure conservation of both scattered en...
متن کاملInvestigation of Natural Convection in a Vertical Cavity Filled with a Anisotropic Porous Media
In present paper, a numerical analysis for a rectangular cavity filled with a anisotropic porous media has been studied. It is assumed that the horizontal walls are adiabatic and impermeable, while the side walls of the cavity are maintained at constant temperatures and concentrations. The buoyancy force that induced the fluid motion are assumed to be cooperative. In the two extreme cases o...
متن کاملTelecentric suppression of diffuse light in imaging of highly anisotropic scattering media.
The telecentric lens, which was originally used in the machine vision industry, has often been utilized in biomedical imaging systems due to its commonly known properties, such as large transverse field of view, constant magnification, and long working distance. However, its potential advantages in optical imaging of biological tissue, which is highly diffusive, have not been fully explored. We...
متن کاملScaling Anisotropic Scattering in Radiative Transfer in Three-dimensional N O N H O M O G E N E O U S Media
Radiative heat transfer in three-dimensional nonhomogeneous participating medium was investigated by using REM 2 method. The anisotropic scattering phase function was dealt with the scaling technique based on delta function approximation. The three-dimensional scaled isotropic results were compared with the published anisotropic scattering computations. A good agreement between the scaled isotr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review. E, Statistical, nonlinear, and soft matter physics
دوره 68 3 Pt 1 شماره
صفحات -
تاریخ انتشار 2003