scholarly journals Extraction of the Structural Properties of Skin Tissue via Diffuse Reflectance Spectroscopy: An Inverse Methodology

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3745
Author(s):  
Bin Chen ◽  
Yong Zhang ◽  
Shang Gao ◽  
Dong Li
Keyword(s):  
Laser Treatment ◽  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Diffuse Reflectance Spectroscopy ◽  
Diffuse Reflectance Spectrum ◽  
Spot Size ◽  
Reflectance Spectroscopy ◽  
Laser Speckle ◽  
Skin Tissue ◽  
Vessel Morphology

For the laser treatment of vascular dermatosis, the blood vessel morphology and depth in skin tissue is essential to achieve personalized intelligent therapy. The morphology can be obtained from the laser speckle imaging, and vessel depth was extracted by an inverse methodology based on diffuse reflectance spectrum. With optimized spot size of 0.5 mm and known optical properties, the proposed method was experimentally validated via the spectral measurement of microcapillary with known size and depth embedded in an epoxy resin-based skin phantom. Results prove that vessel depth can be extracted with an average relative error of 5%, thereby providing the foundation for a personalized, precise, and intelligent laser treatment of vascular dermatosis.

Pigment Identification by Fiber-Optics Diffuse Reflectance Spectroscopy

2002 ◽  
Vol 56 (10) ◽  
pp. 1329-1336 ◽  
Author(s):  
Guillaume Dupuis ◽  
Mady Elias ◽  
Lionel Simonot
Keyword(s):  
Fiber Optics ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Specular Reflection ◽  
Diffuse Reflectance Spectrum ◽  
Reflectance Spectroscopy ◽  
Pigment Identification ◽  
Works Of Art ◽  
Varnish Layer

Fiber-optics reflectance spectroscopy is used to identify pigments in pictorial layers of works of art thanks to a spectra database of dry powdered mineral pigments. Measurements are noninvasive, without any contact, and can be implemented in situ, without moving the work of art under investigation from its conservation place. The experimental device, using the special back-scattering configuration, is briefly presented. The protocol leading to the constitution of the spectra database of dry mineral pigments is described. Unlike other studies, this protocol has been developed to emphasize multiple scattering of light by elementary pigments in comparison with specular reflection on the surface of the sample. In these conditions, the diffuse reflectance spectrum is the label of the mineral pigment. The numerical processing of pigment identification is detailed. Both the influences of the roughness of the studied surface and of a possible varnish layer are taken into account when numerical identification is implemented. Several applications on patrimonial works of art are reported.

scholarly journals Diffuse reflectance spectroscopy for identification of carcinogen transformation stages in skin tissue

2019 ◽  
Vol 25 (3) ◽  
pp. 141-147 ◽  
Author(s):  
Kawthar Shurrab ◽  
Nabil Kochaji ◽  
Wesam Bachir
Keyword(s):  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Diffuse Reflectance Spectrum ◽  
Reflectance Spectroscopy ◽  
Histopathological Diagnosis ◽  
Fiber Optic Probe ◽  
Malignant Tissue ◽  
Simple Method ◽  
Optic Probe ◽  
Cell Changes

Abstract Today, to establish a diagnosis, the patient must undergo a biopsy followed by histopathological diagnosis, which causes unnecessary cost, patient trauma, and time delay to obtain a diagnosis. However, the metastases can be discovered by diffuse reflectance spectroscopy, which is a simple method that investigates the light distribution within tissue. The theme of this paper is the use of diffuse reflectance spectroscopy (DRS) to determine the optical spectrum of hamster specimen’s tissue and to differentiate biological changes due to laser irradiation (scattering, and cell changes) under the skin. DRS measurements were made on healthy and malignant tissue to diagnose the stages of cancer formation using a fiber-optic probe. The results show that malignant tissue is characterized by a significant decrease in diffuse reflectance spectrum compared to normal tissue.

Analytical model of diffuse reflectance spectrum of skin tissue

2014 ◽  
Vol 44 (1) ◽  
pp. 69-75 ◽  
Author(s):  
S A Lisenko ◽  
M M Kugeiko ◽  
V A Firago ◽  
A N Sobchuk
Keyword(s):  
Analytical Model ◽  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Diffuse Reflectance Spectrum ◽  
Skin Tissue

DIFFUSE REFLECTANCE SPECTROSCOPY MONTE-CARLO MODELING: ELONGATED ARTERIAL TISSUES OPTICAL PROPERTIES

2006 ◽  
Vol 39 (18) ◽  
pp. 41-46
Author(s):  
Emilie Péry ◽  
Walter C.P.M. Blondel ◽  
Cédric Thomas ◽  
Jacques Didelon ◽  
François Guillemin
Keyword(s):  
Monte Carlo ◽  
Optical Properties ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy ◽  
Monte Carlo Modeling
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