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Preparation of Mica Supported Lipid Bilayers for High Resolution Optical Microscopy Imaging

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Dependency of crossover point on absorption changes in bilayer diffusion reflection measurements.

Channa Shapira^1,2, Yuval Yedvav¹, Hamootal Duadi^1,2

¹Bar Ilan University, Faculty of Engineering, Ramat Gan, Israel.

Journal of Biomedical Optics

|August 29, 2024

Summary

Understanding diffusion reflection (DR) crossover points is key for noninvasive medical diagnostics. DR crossover point correlates with the square root of absorption coefficients in bilayer phantoms.

Keywords:

absorption coefficient crossover point diffusion reflection

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Published on: November 1, 2018

Area of Science:

Biomedical Optics
Photonics
Medical Imaging

Background:

Diffusion reflection (DR) is crucial for noninvasive medical diagnostics and treatments.
Understanding DR behavior in complex structures like bilayer substances is essential for advancing these applications.

Purpose of the Study:

To investigate the dependency of the diffusion reflection crossover point ( ) on absorption changes in different layers of a bilayer substance.
To determine the relationship between the and the absorption coefficients of the layers, keeping scattering and top layer thickness constant.

Main Methods:

Fabrication and measurement of monolayer and bilayer optical tissue-like phantoms using a DR system.
Comparison of experimental DR data with Monte Carlo simulations for validation.

Main Results:

Experimental results showed strong agreement with Monte Carlo simulations.
The was found to correlate with the square root of the ratio of the lower layer's absorption coefficient to the top layer's absorption coefficient.

Conclusions:

The study validates the theoretical prediction of the dependency on the ratio of absorption coefficients.
A secondary breaking point in DR was experimentally suggested, potentially indicating the noise area threshold.