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
Extension of depth-resolved reconstruction of attenuation coefficients in optical coherence tomography for slim samples
Martin Hohmann,Martin Hohmann,Benjamin Lengenfelder,Rajesh Kanawade,Florian Klämpfl,Michael Schmidt +5 more
TL;DR: In this paper, the measured decay of the coherent light through turbid media with optical coherence tomography (OCT) can be used to reconstruct the attenuation coefficient, which is described by the decrease of the intensity of coherent light.
Journal ArticleDOI
Random walk analysis for reflection and transmission of turbid media
Journal ArticleDOI
Radiance based method for accurate determination of volume scattering parameters using GPU-accelerated Monte Carlo.
TL;DR: This work shows that for samples with moderate optical path lengths, the intensity distribution contains sufficient information to accurately estimate the volume scattering properties, however, for longer optical pathlengths, the descriptive power of theintensity distribution is not enough and radiance distribution based methods, such as the inverse method proposed, are better suited.
Journal ArticleDOI
Monte Carlo model of the depolarization of backscattered linearly polarized light in the sub-diffusion regime.
TL;DR: A predictive model of the depolarization ratio of backscattered linearly polarized light from spatially continuous refractive index media that is applicable to the sub-diffusion regime of light scattering and is validated on tissue simulating phantoms and found to be in good agreement.
Proceedings ArticleDOI
Optical clearing of human cranial bone by administration of immersion agents
TL;DR: In this paper, the authors present experimental results on optical properties of cranial bone controlled by administration of propylene glycol and glycerol, which makes bone more transparent, thereby increasing the ability of light penetration through the tissue.
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.