System of 3D Mueller-matrix reconstruction of fibrillar networks of biological tissues of various morphological structure and physiological state

2018 ◽  
Author(s):  
A. V. Syvokorovskaya ◽  
M. P. Gorsky ◽  
R. Besaga ◽  
Yuriy Ushenko ◽  
Yuriy Tomka ◽  
...  
Keyword(s):  
Physiological State ◽  
Morphological Structure ◽  
Biological Tissues ◽  
Mueller Matrix ◽  
Matrix Reconstruction

scholarly journals Polarization-interference mapping of networks in diffusal polycristaline biological tissues

2019 ◽  
Keyword(s):  
Experimental Testing ◽  
Physiological State ◽  
Morphological Structure ◽  
Biological Tissues ◽  
Mapping Method ◽  
Polycrystalline Structure ◽  
Matrix Mapping ◽  
Stokes Polarimetry ◽  
Rates Of Growth ◽  
Holographic Reconstruction

Objectives: Development and experimental testing of the complex of Stokes-polarimetry and interferometry methods using algorithms for digital holographic reconstruction of the amplitude-phase structure of object fields for obtaining interrelationships between 3D distributions of depolarization maps and peculiarities of the polycrystalline structure of histological sections of biological tissues of different morphological structures and physiological state. Materials and methods: The basis of the 3D Müller-matrix mapping method is the use of a reference wave of laser radiation, which is superimposed on a polarization-non-uniform image of the biological layer in the scheme of the optical interferometer. Results: In the process of comparative analysis of the map of depolarization of biological tissues with different geometric scales of the morphological structure, we found different rates of growth of the degree of depolarization.

Azimuth-invariant mueller-matrix differentiation of the optical anisotropy of biological tissues

2014 ◽  
Vol 117 (1) ◽  
pp. 152-157 ◽  
Author(s):  
V. A. Ushenko ◽  
M. I. Sidor ◽  
Yu. F. Marchuk ◽  
N. V. Pashkovskaya ◽  
D. R. Andreichuk
Keyword(s):  
Optical Anisotropy ◽  
Biological Tissues ◽  
Mueller Matrix

Mathematical modeling of biological tissues electrical conductivity based on the ion electrodiffusion equations

2021 ◽  
Author(s):  
N.V. Kovalenko ◽  
K.V. Sovin ◽  
O.A. Ryabushkin
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Electrical Properties ◽  
Biological Tissue ◽  
Physiological State ◽  
Biological Tissues ◽  
Radiation Heating ◽  
Tissue Degradation ◽  
Simulation Results ◽  
Electrical Properties Of Tissues

Problem formulating. The vital processes of biological tissues are closely related to their electrical properties. An important task is to create a physical and mathematical model that will link the electrical properties of tissues to their physiological state. Goal. Construction of a model of biological tissue electrical properties based on the equations of ion electrodiffusion. Result. The paper presents the model of biological tissue electrical properties based on the ion electrodiffusion equations, and compares the simulation results with the experimental results presented in the literature. Practical meaning. The presented model can be used to describe processes occurring in tissue at the level of concentration and conductivity of ions in individual cells and cell membranes. In particular, the process of tissue degradation during laser radiation heating can be described.

Phenomenological and Structural Aspects of the Mechanical Response of Arteries

2000 ◽  
Author(s):  
Ray W. Ogden ◽  
Christian A. J. Schulze-Bauer
Keyword(s):  
Residual Stresses ◽  
Mechanical Response ◽  
Physiological State ◽  
Circumferential Stress ◽  
Morphological Structure ◽  
Cylindrical Tube ◽  
Single Layer ◽  
Theory Of Elasticity ◽  
Starting Point ◽  
Circular Cylindrical Tube

Abstract In this paper we present some new data from extension-inflation tests on a human iliac artery and then, on the basis of the nonlinear theory of elasticity, we examine a possible model to represent this data. The model considers the artery initially as a thick-walled circular cylindrical tube which may consist of two or more concentric layers. In order to take some account of the architecture (morphological structure), each layer of the material is regarded as consisting of two families of mechanically equivalent helical fibers symmetrically disposed with respect to the cylinder axis. The resulting material properties are then orthotropic in each layer. General formulas for the pressure and the axial load in the symmetric inflation of an extended tube are obtained. The starting point is the unloaded circular cylindrical configuration, but (in general unknown) residual stresses are included in the formulation. The model is illustrated by specializing firstly to the case of a single layer so that the consequences of the hypothesis of uniform circumferential stress in the physiological state can be examined theoretically. This enables the required residual stresses to be calculated explicitly. Secondly, the equations are specialized for the membrane approximation in order to show how certain important characteristics of the experimental data can be replicated using a relatively simple anisotropic membrane model.

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