观察两种膨胀子弹类型和一个带有计算机断层扫描的全金属外套子弹的碎片化 - - 法医弹道学案例研究
Petteri Oura1,2,3, Jaakko Niinimäki4,5, Mikael Brix4,5
1Department of Forensic Medicine, University of Helsinki, P.O. Box 21, FI-00014, Helsinki, Finland. petteri.oura@helsinki.fi.
International journal of legal medicine
|July 16, 2023
概括
计算机断层扫描 (CT) 可以通过分析弹道凝中的碎片模式来区分子弹类型. 膨胀子弹产生了比预期的更小的碎片,而全金属外套子弹的碎片不同于预期.
科学领域:
- 法医科学 法医科学 法医科学
- 弹道学 弹道学 弹道学
- 放射学 放射学是一门学科.
背景情况:
- 计算机断层扫描 (CT) 越来越多地被用于法医调查.
- 在枪支伤害分析中,区分子弹类型至关重要.
- 关于CT识别子弹碎片化模式的能力的研究有限.
研究的目的:
- 调查CT扫描是否可以根据碎片特征区分两个膨胀子弹类型和一个全金属外套子弹.
- 为法医弹道分析建立基于CT的方法.
主要方法:
- 三颗30口径子弹 (Norma Jaktmatch,Norma Ecostrike,Norma Oryx) 射入了10%的弹性凝块中.
- 在凝块上进行了金属工件减少的CT扫描.
- 用3D重建分析和可视化了子弹碎片化参数 (碎片数量,大小,分布).
主要成果:
- 电脑扫描显示了每个子弹类型的不同碎片化模式.
- 全铜膨胀子弹 (Ecostrike) 产生了最小的碎片化.
- 软点膨胀子弹 (Oryx) 产生了许多小碎片,而全金属外套子弹 (Jaktmatch) 意外地碎片化.
- 在不同类型的子弹之间,碎片的分布有很大差异.
结论:
- CT成像有效地根据弹性凝中的碎片化模式区分子弹类型.
- 观察到的碎片化特征挑战了对子弹行为最初的预期.
- 这种基于CT的方法为法医从业者提供了宝贵的工具,特别是在信息有限的情况下.
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