USING 3D-MODELLING METHODS DURING ACUTE HEART INJURY EXAMINATION

Abstract

Despite the fact that the classical methods of acute trauma research are well studied and widely used in forensic medicine, in recent years in the world and domestic forensic practice are increasingly introduced modern computer technology and three-dimensional spatial modeling, which significantly complement and improve visualization of bodily injuries, as well as increase the accuracy of identification of the weapon of injury.Aim of the work. Forensic identification of the stabbing-cutting tool found at the scene and seized by the investigating authorities, with the presence of stab wounds to the heart, using photogrammetry and 3D modeling of the wound canal in the heart muscle.Materials and methods. As the materials of the study were used barbed cutting tool and individual elements of the wound canal, which were examined using photogrammetry and subsequent 3D modeling for their compliance in the examination of acute heart injury.Research results. An example of using the method of 3D modeling is given and its advantages in comparison with classical methods used in forensic practice during the examination of bodily injuries in the forensic identification of stabbing-cutting tools are shown. It is shown that when comparing the 3D model of a knife blade provided by investigators, its length, width at the site of the greatest thickening and bevel of the blade created by photogrammetry and three-dimensional spatial modeling with 3D models of fragments of the wound canal of stab-cut heart damage, their full compliance. The measurement results obtained from 3D models of fragments of the wound canal with the help of computer programs "Agisoft Photoscan" and "3ds max" are an order of magnitude more accurate than the measurements provided by classical methods.Conclusions. The use of photogrammetry and modern 3D modeling technologies allows to obtain 3D models of the wound canal in the thickness of the heart muscle or any other parenchymal organ and stabbing-cutting tool, to make more accurate linear measurements and comparison of fragments of the wound canal with the probable injury tool compliance.The electronic archive of 3D models will allow to save the parameters of damages in their original form, use them during additional, repeated or commission examinations, virtual expert experiment, as well as send by e-mail for remote consultation and investigative bodies and juries for use during court hearings.