Journal ArticleDOI
Determining the optical properties of turbid media by using the adding–doubling method
TLDR
A method is described for finding the optical properties of a slab of turbid material by using total reflection, unscattered transmission, and total transmission measurements and the intrinsic error in the method is < 3% when four quadrature points are used.Abstract:
A method is described for finding the optical properties (scattering, absorption, and scattering anisotropy) of a slab of turbid material by using total reflection, unscattered transmission, and total transmission measurements. This method is applicable to homogeneous turbid slabs with any optical thickness, albedo, or phase function. The slab may have a different index of refraction from its surroundings and may or may not be bounded by glass. The optical properties are obtained by iterating an adding–doubling solution of the radiative transport equation until the calculated values of the reflection and transmission match the measured ones. Exhaustive numerical tests show that the intrinsic error in the method is <3% when four quadrature points are used.read more
Citations
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Journal ArticleDOI
Method to measure the optical properties of small volumes of diffusive media
TL;DR: The method consists of measuring the perturbation provoked by a small volume of the diffusive medium on light propagating through a medium of known optical properties and inversion procedure is based on the solution of the diffusion equation obtained with a perturbative approach.
Proceedings ArticleDOI
In vivo estimation of light scattering and absorption properties of rat brain using single reflectance fiber probe during anoxic depolarization
TL;DR: Potential of the method to evaluate the pathophysiological and loss of tissue viability in brain tissue is indicated by the decrease in μs’ at 800 after the respiratory arrest, indicative of changes in light scattering by tissue.
Dissertation
Development of non-invasive techniques for bladder cancer diagnosis and therapy
TL;DR: This document breaches copyright, and access to the work will be removed immediately and investigate the claim.
Posted ContentDOI
Light propagation within N95 Filtered Face Respirators: A simulation study for UVC decontamination
Lothar Lilge,Lothar Lilge,Angelica Manalac,Madrigal Weersink,Fynn Schwiegelshohn,Tanner Young-Schultz,Abdallatif Satti Abdalrhman,Chengjin Wang,Aldrich Ngan,Frank X. Gu,Vaughn Betz,Ron Hofmann +11 more
TL;DR: Numerical simulations of UVC light propagation through seven different filtered face respirators (FFR) provide feedback on a respirator's suitability for UV germicidal inactivation (UVGI) and the required exposure time for a given light source.
References
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Journal ArticleDOI
A simplex method for function minimization
John A. Nelder,R. Mead +1 more
TL;DR: A method is described for the minimization of a function of n variables, which depends on the comparison of function values at the (n 41) vertices of a general simplex, followed by the replacement of the vertex with the highest value by another point.
Book
Introduction to Numerical Analysis
Josef Stoer,Roland Bulirsch +1 more
TL;DR: This well written book is enlarged by the following topics: B-splines and their computation, elimination methods for large sparse systems of linear equations, Lanczos algorithm for eigenvalue problems, implicit shift techniques for theLR and QR algorithm, implicit differential equations, differential algebraic systems, new methods for stiff differential equations and preconditioning techniques.
Journal ArticleDOI
A review of the optical properties of biological tissues
TL;DR: The known optical properties (absorption, scattering, total attenuation, effective attenuation and/or anisotropy coefficients) of various biological tissues at a variety of wavelengths are reviewed in this article.
Journal ArticleDOI
New contributions to the optics of intensely light-scattering materials.
TL;DR: In this paper, the Gurevic and Judd formulas were derived from the Kubelka-Munk differential equations, and they are exact under the same conditions as in this paper, that is, when the material is perfectly dull and when the light, is perfectly diffused or if it is parallel and hits the specimen under an angle of 60° from normal.