Journal ArticleDOI
A review of the optical properties of biological tissues
TLDR
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.Abstract:
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. The theoretical foundations for most experimental approaches are outlined. Relations between Kubelka-Munk parameters and transport coefficients are listed. The optical properties of aorta, liver, and muscle at 633 nm are discussed in detail. An extensive bibliography is provided. >read more
Citations
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Journal ArticleDOI
Spectroscopic analysis of changes in remitted illumination: the response to increased neural activity in brain.
John E. W. Mayhew,Ying Zheng,Yuqian Hou,Bob Vuksanovic,Jason Berwick,Steve Askew,Peter J. Coffey +6 more
TL;DR: The research uses a modification of the Beer-Lambert Law called path-length scaling analysis (PLSA) to analyze the spectra of the hemodynamic and metabolic responses to vibrissal stimulation in rat somatosensory cortex and demonstrates the PLSA algorithm to be capable of disassociating changes in cytochrome oxidation state from changes in hemoglobin oxygenation.
Patent
Methods and systems for optical imaging of epithelial luminal organs by beam scanning thereof
TL;DR: In this article, an arrangement, system or apparatus can be inserted via at least one of a mouth or a nose of a patient, and the arrangement can be configured to compensate for the aberration caused by the second arrangement and/or the third arrangement.
Journal ArticleDOI
Modelling the sampling volume for skin blood oxygenation measurements
TL;DR: A Monte Carlo simulation has been developed to estimate the sampling volume offered by fibre-optic probes with a small source-detector spacing, and it is shown that rough boundaries between layers of different refractive index can play a significant role in skin optics.
Journal ArticleDOI
Light dosimetry in vivo
TL;DR: It appears that for strongly forward scattering, as in mammalian tissues, rather detailed knowledge of the scattering function is needed to reliably calculate the fluence rate close to the surface, and minimally invasive absolute fluence (rate) measurements seem to be possible with an accuracy of 10-20%.
Journal ArticleDOI
Optical and acoustic properties at 1064 nm of polyvinyl chloride-plastisol for use as a tissue phantom in biomedical optoacoustics.
Gloria Spirou,Alexander A. Oraevsky,I. Alex Vitkin,I. Alex Vitkin,William M. Whelan,William M. Whelan +5 more
TL;DR: The speed of sound and density of PVCP are similar to tissue, and together with the user-adjustable optical properties, make this material well suited for developing tissue-equivalent phantoms for biomedical optoacoustics.
References
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Journal ArticleDOI
The Optics of Human Skin
R. Rox Anderson,John A. Parrish +1 more
TL;DR: An integrated review of the transfer of optical radiation into human skin is presented, aimed at developing useful models for photomedicine.
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.
Journal ArticleDOI
Time resolved reflectance and transmittance for the non-invasive measurement of tissue optical properties.
TL;DR: A simple model is developed, based on the diffusion approximation to radiative transfer theory, which yields analytic expressions for the pulse shape in terms of the interaction coefficients of a homogeneous slab.
Journal ArticleDOI
The delta-Eddington approximation for radiative flux transfer
TL;DR: In this paper, the delta-Eddington approximation was used to calculate monochromatic radiative fluxes in an absorbing-scattering atmosphere, by combining a Dirac delta function and a two-term approximation, which overcomes the poor accuracy of the Eddington approximation for highly asymmetric phase functions.