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
Bulk Optical Properties of Potato Flesh in the 500–1900 nm Range
Ainara López-Maestresalas,Ben Aernouts,Robbe Van Beers,S. Arazuri,Carmen Jarén,Josse De Baerdemaeker,Wouter Saeys +6 more
TL;DR: In this paper, the optical properties of potato flesh were estimated using doubleintegrating sphere (DIS) measurements combined with an inverse adding-doubling (IAD) light propagation model.
Journal ArticleDOI
Comparison of spectral variation from spectroscopy to spectral imaging
TL;DR: It is predicted that fiber-optic probe designs that mimic a spectral imaging geometry and spectral imaging systems designed to emulate a probe- based geometry will be difficult to implement, pointing toward a posteriori correction for illumination-collection geometry to reconcile imaging and probe-based spectral line shapes.
Journal ArticleDOI
Optical scattering, absorption, and polarization of healthy and neovascularized human retinal tissues
TL;DR: The polarization studies show that the retinal tissues possess significant intrinsic polarization characteristics, that are more pronounced in diseased tissues than in healthy tissues.
Journal ArticleDOI
Integrating sphere effect in whole-bladder-wall photodynamic therapy: III. Fluence multiplication, optical penetration and light distribution with an eccentric source for human bladder optical properties
H J van Staveren,Marleen Keijzer,T. Keesmaat,Harald Jansen,W. Kirkel,Johan F. Beek,Willem M. Star +6 more
TL;DR: Results indicate that WBW PDT should be performed with some kind of in situ light dosimetry, and the integrating sphere effect calculated with diffusion approximation is increasingly larger than that found with MC simulations.
Journal ArticleDOI
Optical properties of brain tissues at the different stages of glioma development in rats: pilot study.
Elina A. Genina,Alexey N. Bashkatov,Daria K. Tuchina,Polina A. Dyachenko,Nikita A. Navolokin,Alexander Shirokov,Alexander Khorovodov,Andrey Terskov,Maria Klimova,Aysel Mamedova,Inna Blokhina,Ilana Agranovich,Ekaterina Zinchenko,Oxana Semyachkina-Glushkovskaya,Valery V. Tuchin +14 more
TL;DR: Measurements of the optical properties of brain tissues in healthy rats and rats with C6-glioma found that the 10-day development of glioma led to increase of absorption coefficient, which was associated with the water content elevation in the tumor.
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.