Tissues viability and blood flow sensing based on a new nanophotonics method

Inbar Yariv; Menashe Haddad; Hamootal Duadi; Menachem Motiei; Dror Fixler

doi:10.1117/12.2281789

20 February 2018 Tissues viability and blood flow sensing based on a new nanophotonics method

Inbar Yariv, Menashe Haddad, Hamootal Duadi, Menachem Motiei, Dror Fixler

Proceedings Volume 10506, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XV; 105061B (2018) https://doi.org/10.1117/12.2281789
Event: SPIE BiOS, 2018, San Francisco, California, United States

Abstract

Extracting optical parameters of turbid medium (e.g. tissue) by light reflectance signals is of great interest and has many applications in the medical world, life science, material analysis and biomedical optics. The reemitted light from an irradiated tissue is affected by the light's interaction with the tissue components and contains the information about the tissue structure and physiological state. In this research we present a novel noninvasive nanophotonics technique, i.e., iterative multi-plane optical property extraction (IMOPE) based on reflectance measurements. The reflectance based IMOPE was applied for tissue viability examination, detection of gold nanorods (GNRs) within the blood circulation as well as blood flow detection using the GNRs presence within the blood vessels. The basics of the IMOPE combine a simple experimental setup for recording light intensity images with an iterative Gerchberg–Saxton (G-S) algorithm for reconstructing the reflected light phase and computing its standard deviation (STD). Changes in tissue composition affect its optical properties which results in changes in the light phase that can be measured by its STD. This work presents reflectance based IMOPE tissue viability examination, producing a decrease in the computed STD for older tissues, as well as investigating their organic material absorption capability. Finally, differentiation of the femoral vein from adjacent tissues using GNRs and the detection of their presence within blood circulation and tissues are also presented with high sensitivity (better than computed tomography) to low quantities of GNRs (<3 mg).

Citation Download Citation

Inbar Yariv, Menashe Haddad, Hamootal Duadi, Menachem Motiei, and Dror Fixler "Tissues viability and blood flow sensing based on a new nanophotonics method", Proc. SPIE 10506, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications XV, 105061B (20 February 2018); https://doi.org/10.1117/12.2281789

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KEYWORDS

Tissues

Veins

Reflectivity

Scattering

Light scattering

Blood circulation

Optical properties

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