Polarization-phase images of liquor polycrystalline films in determining time of death

M. S. Garazdyuk; V. T. Bachinskyi; O. Ya. Vanchulyak; A. G. Ushenko; O. V. Dubolazov; M. P. Gorsky

doi:10.1364/AO.55.000B67

Applied Optics
Vol. 55,
Issue 12,
pp. B67-B71
(2016)
•https://doi.org/10.1364/AO.55.000B67

Polarization-phase images of liquor polycrystalline films in determining time of death

M. S. Garazdyuk, V. T. Bachinskyi, O. Ya. Vanchulyak, A. G. Ushenko, O. V. Dubolazov, and M. P. Gorsky

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M. S. Garazdyuk, V. T. Bachinskyi, O. Ya. Vanchulyak, A. G. Ushenko, O. V. Dubolazov, and M. P. Gorsky, "Polarization-phase images of liquor polycrystalline films in determining time of death," Appl. Opt. 55, B67-B71 (2016)

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Abstract

An optical model for generalized optical anisotropy of polycrystalline networks of albumin and globulin liquor of the human brain has been suggested. The polarization-phase method for spatial and frequency differentiation of linear and circular birefringence coordinate distributions has been analytically substantiated. A set of criteria documenting the dynamics of polarization-phase images of liquor polycrystalline films has been identified in determining time of death.

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$T (h)$	1	7	13	20	26	32
$M_{3}$	$0.86 \pm 0.065$	$1.03 \pm 0.083$	$1.2 \pm 0.096$	$1.37 \pm 1.11$	$1.54 \pm 1, 12$	$1.71 \pm 0, 14$
$p$	$p < 0.001$
$M_{4}$	$0.83 \pm 0.061$	$1.02 \pm 0.082$	$1.18 \pm 0.094$	$1.34 \pm 0.11$	$1.51 \pm 0.12$	$1.68 \pm 0.14$
$p$	$p < 0.001$

$T (h)$	1	3	5	7	10	14
$M_{3}$	$1.09 \pm 0.085$	$1.26 \pm 0.105$	$1.43 \pm 0.11$	$1.6 \pm 0.12$	$1.77 \pm 0.14$	$1.94 \pm 0.16$
$p$	$p < 0.001$
$M_{4}$	$1.06 \pm 0.086$	$1.23 \pm 0.1$	$1.4 \pm 0.11$	$1.57 \pm 0.12$	$1.74 \pm 0.14$	$1.91 \pm 0.16$
$p$	$p < 0.001$

$M_{i}^{0}$	$ω$	$ψ$
$M_{3}^{0}$	$0.57 \pm 0.039$	$0.48 \pm 0.031$
$p$	$p < 0.001$	$p < 0.001$
$M_{4}^{0}$	$0.44 \pm 0.034$	$0.39 \pm 0.028$
$p$	$p < 0.001$	$p < 0.001$

Parameters	Interval of DCP Determination, $T$	Accuracy of DCP Determination, $Δ T$
Distribution of polarization azimuths of the large-scale component of a microscopic image	30 h	45 min
Distribution of polarization azimuths of the small-scale component of a microscopic image	14 h	25 min

$T (h)$	1	7	13	20	26	32
$M_{3}$	$0.86 \pm 0.065$	$1.03 \pm 0.083$	$1.2 \pm 0.096$	$1.37 \pm 1.11$	$1.54 \pm 1, 12$	$1.71 \pm 0, 14$
$p$	$p < 0.001$
$M_{4}$	$0.83 \pm 0.061$	$1.02 \pm 0.082$	$1.18 \pm 0.094$	$1.34 \pm 0.11$	$1.51 \pm 0.12$	$1.68 \pm 0.14$
$p$	$p < 0.001$

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Applied Optics