Epithelial cancers and photon migration: Monte Carlo simulations and diffuse reflectance measurements

2015 ◽  
Author(s):  
Jerome Tubiana ◽  
Alex J. Kass ◽  
Maya Y. Newman ◽  
David Levitz
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Diffuse Reflectance ◽  
Photon Migration ◽  
Epithelial Cancers ◽  
Reflectance Measurements

scholarly journals Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring

2002 ◽  
Vol 4 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Frank Schael ◽  
Oliver Reich ◽  
Sonja Engelhard
Keyword(s):  
Diffuse Reflectance ◽  
Near Infrared ◽  
Transport Theory ◽  
Radiation Transport ◽  
Diffusion Theory ◽  
Nile Blue ◽  
Milk Powder ◽  
Photon Migration ◽  
Heterogenous Media ◽  
Reflectance Measurements

Diffuse reflectance measurements and photon migration studies with near infrared (NIR) diode lasers were employed to elucidate experimental methods for determining absorption and scattering coefficients and species concentrations in heterogenous media. Measurements were performed at a number of wavelengths utilizing several laser sources some of which were widely tunable. In order to establish the applicability of simple photon migration models derived from radiation transport theory and to check the experimental boundary conditions of our measurements, simple light scattering solutions (such as suspensions of titanium dioxide, latex particles, and solutions of milk powder) containing dyes (such as nile blue, isosulfan blue) were investigated. The results obtained from diffuse-reflectance studies at different sourcedetector distances were in accordance with predictions from simple photon diffusion theory. Applications of reflectance measurements for monitoring of cell growth during fermentation processes and forin-situinvestigations of soils are presented.

Photon migration in upscaled tissue models: measurements and Monte Carlo simulations

1993 ◽  
Author(s):  
Frits F. M. de Mul ◽  
Marco H. Koelink ◽  
M. Kok ◽  
Jan Greve ◽  
Reindert Graaff ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Photon Migration ◽  
Tissue Models

Sampling of time- and frequency-domain signals in Monte Carlo simulations of photon migration

1999 ◽  
Vol 38 (1) ◽  
pp. 236 ◽  
Author(s):  
Markus Testorf ◽  
Ulf Österberg ◽  
Brian Pogue ◽  
Keith Paulsen
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Frequency Domain ◽  
Photon Migration

Diffuse Reflectance Light on Surface of Biological Material

2012 ◽  
Vol 557-559 ◽  
pp. 700-703
Author(s):  
Lian Shun Zhang ◽  
Wen Li Liu
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Biological Material ◽  
Diffuse Reflectance ◽  
Optical Scattering ◽  
Radial Dependence ◽  
Slab Geometry ◽  
Scattering Coefficients ◽  
State Diffusion ◽  
Steady State Diffusion

The absorption and transport scattering coefficients of biological material determine the radial dependence of the diffuse reflectance light that is due to a point source. In order to noninvasive determinate the optical scattering and absorption coefficients of biological material, we must know the radial dependence of the diffuse reflectance. The diffusion approximation of the radiative transfer equation is a model used widely to describe photon migration in biological material. An analysis of the steady state diffusion equation together with its solution of the diffuse reflectance light for the slab geometry and for a semi-infinite diffusing biological material is reported. The result has been compared with that obtained from Monte Carlo simulations. The comparison has shown that the solution about the diffuse reflectance light on surface of biological material is the same as that obtained from Monte Carlo simulations.

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