Correlation structure of Stokes parametric images of polycrystalline films of human biological fluids

Dubolazov, Olexander V.; Sakhnovskiy, Mikhailo; Garazduyk, M. S.; Syvokorovskaya, Anna; Bodnar, G. B.; Ушенко, В. А.; Olar, O. I.; Tsyhykalo, O. V.

doi:10.1117/12.2320512

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“…At the present stage of science development, laser optical methods are effective for studying structural changes in biological tissues and liquids [4,5]. Thus, on the example of brain tissue, muscles, parenchymatous organs, and in the study of liquor films, it was found that the temporal dynamics of changes in the morphological structure of biological tissues and fluids in the post-mortem period is accompanied by dynamic patterns of change in the structure of their polarization images, which is the basis for determining PMI [6,7]. The monitoring of vitreous body (VB) biochemical changes has already been successfully used to diagnose PMI [3,8,9], it is appropriate to attempt to investigate its structural changes by polarization methods.…”

Section: Introductionmentioning

confidence: 99%

Postmortem Interval Estimation by the Method of Wavelet Analysis of Stokes-Polarimetric Mapping Data of Human Vitreous Body Layers

et al. 2021

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The aim: To develop a set of forensic criteria for determining PMI on the basis of complex selective statistical data analysis of magnitude distributions of the wavelet-amplitude coefficients of VB polycrystalline films microscopic images. Materials and methods: The object of study are polycrystalline films of VB, taken from 41 cadavers of both sexes aged from 37 to 79-year with pre-known time of death coming ranged from 3 to 36 h. Measuring the coordinate allocation meanings of parameters of polarization in the points of microscopic images was carried out at the location of the standard Stokes-polarimeter. Results: The magnitudes of statistical moments of the 1st-4th orders linearly vary within 36 hours. It was revealed that the data of time changes of the asymmetry and the excess are the most sensitive to necrotic changes in the polycrystalline structure of such samples. Conclusions: The scale-selective approach provides an increase in the range of sensitivity up to 36 h and increase the accuracy of the PMI estimation up to 45 min.

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