Biomedical subjects

A G Ushenko

Publications and source records attributed to A G Ushenko.

5 recordsLinked to original sources

PubMed2005

Investigation of the correlation structure of biological tissue polarization images during the diagnostics of their oncological changes.

We have considered the theoretical background of biological tissue complex polarization analysis: (1) polarization mapping; (2) polarization-correlation mapping; (3) polarization correlometry. The technique of interferometric measurements of 2D distributions of the complex degree of mutual polarization of biological tissue images has been proposed. The totality of diagnostically urgent interconnections between the statistical and correlation structure of biological tissue polarization images and the optical-geometrical structure of their architectonics has been determined.

Animals↗

PubMedDate not supplied

Wavelet analysis of two-dimensional birefringence images of architectonics in biotissues for diagnosing pathological changes.

A method for polarization filtering, correlation processing, and wavelet analysis of coherent images of physiologically normal and necrotically changed (myocardium infarct) muscle tissue is presented. A technique for early optical diagnosis of the appearance of these biological tissues and the course of their degenerative-dystrophic changes is proposed.

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PubMedDate not supplied

Polarization visualization and selection of biotissue image two-layer scattering medium.

We analyze and experimentally test the concept of laser polarization biotissue probing. The methods of increasing the SNR in coherent images of the optically anisotropic architectonics of the morphological biotissue structure are considered. The possibilities of polarization selection and contrasting of such images screened by other biotissues are examined. The influence of the depolarization degree of the scattered background on the SNR is investigated. The possibilities of polarization correction of the probing beam for contrasting biotissue images are analyzed.

Animals↗

PubMedDate not supplied

Polarization-correlation mapping of biological tissue coherent images.

We investigate the statistical polarization parameters of biological tissue histological section images with different morphological structure. First we outline the results of polarization coordinate mapping and analysis of the statistics of the first to fourth orders of biological tissue image polarization azimuth and ellipticities. Second, we study the statistics of the first to fourth orders of coordinate distributions of the complex degree of mutual polarization (CDMP) of biological tissue images. Finally, we consider the diagnostic possibilities of investigating 2-D distributions of CDMP of images that correspond to physiologically normal and degeneratively and/or dystrophycally changed biological tissues that are being analyzed.

Animals↗

PubMedDate not supplied

Polarization singularities of biological tissues images.

The ways to the polarization singularities of the biological tissues images of various morphological structures have been theoretically analyzed. The coordinate distributions of singly (linear states of polarization) and doubly degenerated (circular states of polarization) polarization singularities of the physiologically normal and pathologically changed biological tissues have been experimentally examined. The statistical criteria of diagnostics of the kidney tissue collagenous disease (the third and the fourth statistical moments of the linear density singularity points) have been determined. It was discovered that the process of the pathological change of the kidney tissue morphology leads to the formation of the self-similar (fractal) coordinate distribution of the polarization singularities of its image.

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