Forensic medical evaluation of hemorrhages into the brain of traumatic and non-traumatic genesis by the Mueller matrix microscopy of circular dichroism

Abstract

The aim of the work is to develop forensic criteria for differentiation of hemorrhages of traumatic and non-traumatic genesis by digital Mueller matrix (MM) polarization microscopy of histological sections of human brain substance (HBS).Material and methods. Native histological preparations of HBS from 32 corpses with ischemic stroke (1 group), 35 corpses with hemorrhages of traumatic origin (2 groups), 33 corpses with hemorrhages in HBS of non-traumatic genesis (3 group) and 30 corpses caused by acute coronary insufficiency (4 control group). The method of research is azimuthal-invariant MM microscopy of circular dichroism (CD) of histological sections of the brain.Results. The results of studies of the coordinate and statistical structure of maps of the size of values at the points of digital microscopic images of histological sections of HBS of the dead of all groups revealed a coordinate-inhomogeneous structure of all distributions of the size of the CD of microscopic images of histological sections of the dead of all groups. Probable distributions that characterize MM invariants CD maps of histological sections of brain samples from all groups have a small scatter of values of the statistical moment of the 2nd order, as well as significant values of statistical moments of the 3rd and 4th orders.Conclusion. The efficiency of using the Mueller-matrix mapping method in diagnosing of hemorrhage genesis in the brain substance in the differentiation of the set of samples of control and experimental groups reaches a satisfactory level - 77% - 78%.