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Related Concept Videos

Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

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Agarose-based Tissue Mimicking Optical Phantoms for Diffuse Reflectance Spectroscopy
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Published on: August 22, 2018

Simple two-layer reflectance model for biological tissue applications.

George Mantis1, George Zonios

  • 1Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.

Applied Optics
|June 23, 2009
PubMed
Summary
This summary is machine-generated.

A new two-layer diffuse reflectance model estimates superficial tissue properties noninvasively. This fiber optic probe model simplifies analysis for biological tissue studies, offering accurate absorption and thickness measurements.

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Area of Science:

  • Biomedical Optics
  • Biophotonics
  • Tissue Optics

Background:

  • In vivo skin reflectance analysis is crucial for noninvasive biological tissue studies.
  • Existing models may lack simplicity or ease of application for fiber optic probes.
  • Estimating superficial layer properties like thickness and absorption is of significant interest.

Purpose of the Study:

  • To describe a novel two-layer tissue diffuse reflectance model.
  • To adapt a previously developed one-layer model for enhanced tissue analysis.
  • To provide a simple and easily applicable model for fiber optic probe measurements.

Main Methods:

  • Development of a two-layer diffuse reflectance model based on a prior one-layer model.
  • Design of the model for compatibility with fiber optic probes.
  • Testing the model's validity and accuracy using tissue phantoms in forward and inverse modes.

Main Results:

  • The model successfully estimates the thickness of a superficial absorbing and scattering layer.
  • The model accurately determines the absorption coefficient of the superficial layer.
  • Validation on tissue phantoms demonstrates the model's reliability in both forward and inverse applications.

Conclusions:

  • The two-layer diffuse reflectance model offers a simple and effective method for noninvasive analysis of epithelial biological tissues.
  • The model's ability to estimate superficial layer thickness and absorption is valuable for biomedical research.
  • The model's ease of use with fiber optic probes facilitates practical applications in tissue optics.