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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Proceedings ArticleDOI
In-vitro study of control of human dura mater optical properties by acting of osmotical liquids
Alexey N. Bashkatov,Elina A. Genina,Vyacheslav I. Kochubey,Yurii P. Sinichkin,Andrey A. Korobov,Nina A. Lakodina,Valery V. Tuchin +6 more
TL;DR: In this article, experimental results and computer modeling of investigation on the optical properties of the human dura mater controlled by administration of osmotically active chemical, such as mannitol and glucose solutions with various concentrations.
Journal ArticleDOI
Polyacrylamide hydrogel phantoms for performance evaluation of multispectral photoacoustic imaging systems
Ali Hariri,Jorge Palma-Chavez,Keith A. Wear,T. Joshua Pfefer,Jesse V. Jokerst,William C. Vogt +5 more
TL;DR: In this article, the authors introduce polyacrylamide hydrogel as a candidate material for fabricating stable phantoms with well-characterized optical and acoustic properties that are biologically relevant over a broad range of system design parameters.
Journal ArticleDOI
Photodynamic therapy for the treatment of induced mammary tumor in rats.
Isabelle Ferreira,Juliana Ferreira,José Dirceu Vollet-Filho,Lilian Tan Moriyama,Vanderlei Salvador Bagnato,Daisy Maria Favero Salvadori,Noeme Sousa Rocha +6 more
TL;DR: PDT used in the experimental model of mammary tumor as a single therapy was effective in reducing tumor development, so the surgery associated with PDT is a safe and efficient destruction of residual tumor, preventing recurrence of the tumor.
Journal ArticleDOI
Potential of a spectroscopic measurement method using adding-doubling to retrieve the bulk optical properties of dense microalgal media.
TL;DR: The absorption coefficients obtained for the four samples of this study appear not to be more informative about pigment composition than would be classical methods in analytical spectroscopy; however, there is a real added value in measuring the reduced scattering coefficient, as it appears to be strongly correlated to the size distribution of the algal cells.
Journal ArticleDOI
Approaches for calibration and validation of near-infrared optical methods for oxygenation monitoring.
TL;DR: The current status and problems of calibration and validation in pulse oximetry and cerebral tissueOximetry including the pros and cons of in vivo as well as in vitro methods are presented.
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.