Virtual animation of victim-specific 3D models obtained from CT scans for forensic reconstructions: Living and dead subjects
| Autor: | Kristine Boisen Olsen, Chiara Villa, Steen Holger Hansen |
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| Rok vydání: | 2017 |
| Předmět: |
Male
Thorax medicine.medical_specialty Injury control Forensic Ballistics Computer science Accident prevention Poison control 3d model 01 natural sciences Pathology and Forensic Medicine 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine medicine Humans Computer Simulation Whole Body Imaging 030216 legal & forensic medicine 010401 analytical chemistry Animation techniques Animation Anatomy 0104 chemical sciences Surgery Human anatomy Female Wounds Gunshot Tomography X-Ray Computed Law Software |
| Zdroj: | Forensic Science International. 278:e27-e33 |
| ISSN: | 0379-0738 |
| DOI: | 10.1016/j.forsciint.2017.06.033 |
| Popis: | Post-mortem CT scanning (PMCT) has been introduced at several forensic medical institutions many years ago and has proved to be a useful tool. 3D models of bones, skin, internal organs and bullet paths can rapidly be generated using post-processing software. These 3D models reflect the individual physiognomics and can be used to create whole-body 3D virtual animations. In such way, virtual reconstructions of the probable ante-mortem postures of victims can be constructed and contribute to understand the sequence of events. This procedure is demonstrated in two victims of gunshot injuries. Case #1 was a man showing three perforating gunshot wounds, who died due to the injuries of the incident. Whole-body PMCT was performed and 3D reconstructions of bones, relevant internal organs and bullet paths were generated. Using 3ds Max software and a human anatomy 3D model, a virtual animated body was built and probable ante-mortem postures visualized. Case #2 was a man presenting three perforating gunshot wounds, who survived the incident: one in the left arm and two in the thorax. Only CT scans of the thorax, abdomen and the injured arm were provided by the hospital. Therefore, a whole-body 3D model reflecting the anatomical proportions of the patient was made combining the actual bones of the victim with those obtained from the human anatomy 3D model. The resulted 3D model was used for the animation process. Several probable postures were also visualized in this case. It has be shown that in Case #1 the lesions and the bullet path were not consistent with an upright standing position; instead, the victim was slightly bent forward, i.e. he was sitting or running when he was shot. In Case #2, one of the bullets could have passed through the arm and continued into the thorax. In conclusion, specialized 3D modelling and animation techniques allow for the reconstruction of ante-mortem postures based on both PMCT and clinical CT. |
| Databáze: | OpenAIRE |
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