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Your search keyword '"Angelsky, P. O."' showing total 38 results
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38 results on '"Angelsky, P. O."'

20. Correlation optical microscopy of anisotropic biological layers.

Author

Ushenko, A. G., Dubolazov, A. V., Ushenko, Yu. A., Sakhnovskiy, M. Yu., Olar, O. V., Motrich, A. V., and Angelsky, P. O.

Subjects
MICROSCOPY, BIOPSY, ANISOTROPY, BIREFRINGENCE, MYOCARDIUM, MYOSIN, PARAMETER estimation
Abstract

The theoretical background of an azimuthally stable method for Jones-matrix mapping histological sections of biopsy taken from myocardium tissue on the basis of spatial frequency selection of mechanisms responsible for linear and circular birefringence is presented. The diagnostic application of a new correlation parameter - complex degree of mutual anisotropy - has been analytically substantiated. The method for measuring coordinate distributions of complex degree of mutual anisotropy with further spatial filtration of their high- and low-frequency components has been developed. The interrelations of these distributions with parameters of linear and circular birefringence in myocardium tissue histological sections have been found. The comparative results of measuring the coordinate distributions inherent to complex degree of mutual anisotropy related with fibrillar networks of myosin fibrils typical for myocardium tissue in different necrotic states, when death is caused by coronary heart disease and acute coronary insufficiency, have been presented. The values and ranges of changes in the statistical (moments of the 1st to 4th order) parameters describing the complex degree of mutual anisotropy coordinate distributions have been studied. The objective criteria for differentiation of causes leading to death have been determined. [ABSTRACT FROM AUTHOR]

Published
2017
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21. Brief description of laser polarimetry microscopy methods of optically anisotropic biological layers.

Author

Ushenko, A. G., Dubolazov, A. V., Ushenko, V. A., Ushenko, Yu. A., Sakhnovskiy, M. Yu., Olar, O. V., Motrich, A. V., Angelsky, P. O., and Gorsky, M. P.

Subjects
LASER microscopy, OPTICAL properties of tissues, BIREFRINGENCE, POLYCRYSTALS, POLARIMETRY, ANISOTROPY
Abstract

The results of optical modeling biological tissues polycrystalline multilayer networks have been presented. Algorithms providing reconstruction of parameter distributions were determined, which enabled to describe linear and circular birefringence in these tissues. To separate manifestations of the respective mechanisms, we propose the method for space-frequency filtering. Criteria for differentiation of benign and malignant tissues of the women reproductive sphere have been found. [ABSTRACT FROM AUTHOR]

Published
2016
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25. Statistical structure of the biological tissue scattering of laser field with the complex degree of coherence.

Author

Angelsky, P. O.

Subjects
*TISSUES, *BIREFRINGENCE, *CLINICAL chemistry, *SCATTERING (Physics), *LASERS
Abstract

Diagnostic efficiency of differentiation of birefringence of rat's biological tissues in different physiological states is studied in this research based on application of the correlation approach. Interrelation between coordinate distributions of complex degree of coherence (CDC) and changes in birefringence has been determined. [ABSTRACT FROM AUTHOR]

Published
2014

37. The investigation of the peculiarities of the nano- and micro-object motion in the inhomogenous optical field

Author

Zenkova, C. Y., Gorsky, M. P., Soltys, I. V., and Angelsky, P. O.

Abstract

The paper proposes for consideration an additional possibility to evaluate the degree of coherence of superposing mutually orthogonal linearly-polarized in the incidence plane waves. When analyzing the behavior of various-type particles (Mie and Rayleigh) in the inhomogeneously polarized optical field and in the inhomogeneous field of the averaged values of the Poynting vector, we obtain an additional tool for defining the degree of coherence of interacting fields. The spatial modulation of polarization in the observation plane shapes the spatial modulation of the energy density volume, which changes the velocity of the particle motion according to the coherence characteristics of the superposing fields and to the resulting optical force that causes the motion and trapping of the tested particles.

Published
2011
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38. Use of motion peculiarities of test particles for estimating degree of coherence of optical fields.

Author

Zenkova, C. Yu., Gorsky, M. P., Soltys, I. V., and Angelsky, P. O.

Subjects
*SPECTRAL energy distribution, *SPECTRUM analysis, *VELOCITY, *SCATTERING (Physics), *COLLISIONS (Physics)
Abstract

We discuss interconnections between the depth of spatial inhomogeneity of energy distribution of the optical fields and the velocity of motion of test particles for the cases of different light scattering mechanisms during interaction with light. We suggest an additional tool for determining the degree of coherence of superposing waves that propagate along mutually orthogonal directions and have orthogonal polarisations, being linearly polarised in the incidence plane. The use of velocity of the test particles while estimating the degree of coherence of optical fields is suggested for the first time. [ABSTRACT FROM AUTHOR]

Published
2012
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