Error estimation on extracorporeal trajectory determination from body scans.

Details

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Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_2C6A978BD259
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Error estimation on extracorporeal trajectory determination from body scans.
Journal
International journal of legal medicine
Author(s)
Riva F., Buck U., Buße K., Hermsen R., Mattijssen EJAT, Kerkhoff W.
ISSN
1437-1596 (Electronic)
ISSN-L
0937-9827
Publication state
Published
Issued date
05/2022
Peer-reviewed
Oui
Volume
136
Number
3
Pages
729-737
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
This study explores the magnitude of two sources of error that are introduced when extracorporeal bullet trajectories are based on post-mortem computed tomography (PMCT) and/or surface scanning of a body. The first source of error is caused by an altered gravitational pull on soft tissue, which is introduced when a body is scanned in another position than it had when hit. The second source of error is introduced when scanned images are translated into a virtual representation of the victim's body. To study the combined magnitude of these errors, virtual shooting trajectories with known vertical angles through five "victims" (live test persons) were simulated. The positions of the simulated wounds on the bodies were marked, with the victims in upright positions. Next, the victims were scanned in supine position, using 3D surface scanning, similar to a body's position when scanned during a PMCT. Seven experts, used to working with 3D data, were asked to determine the bullet trajectories based on the virtual representations of the bodies. The errors between the known and determined trajectories were analysed and discussed. The results of this study give a feel for the magnitude of the introduced errors and can be used to reconstruct actual shooting incidents using PMCT data.
Keywords
Humans, Tomography, X-Ray Computed/methods, 3D trajectory reconstruction, Bullet trajectory, Computer Tomography, Error estimation, Forensic, Shooting incident reconstruction
Pubmed
Web of science
Open Access
Yes
Create date
30/08/2021 7:48
Last modification date
05/05/2022 6:34
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