研究热暴露后血迹的可视化方法。

IF 1.5 4区 医学 Q2 MEDICINE, LEGAL
Junyi Di BE, Xinyu Yan ME, Peibin Wang BE, Zhengzhe Zang BE, Jing Jin PE, Jinzhuan Zhang ME
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引用次数: 0

摘要

为了建立血迹受热条件与增强技术视觉效果之间的相关性,我们使用红外摄影和四种化学增强试剂来观察受热后的血迹。选择黑色瓷砖作为基底以强化可视化挑战,并以锥形量热计作为标准加热源以控制热条件。与标准摄影相比,红外摄影被证明是化学试剂的重要补充,在热暴露后血迹的可视化方面具有显著优势。但值得注意的是,当血迹呈现凸起、凹凸形态或在特定条件下血迹几乎消失时,红外图像的效果就不如标准图像。研究发现,增强效果与施加在血迹上的热条件密切相关,血迹在加热过程中的形态演变也会影响化学增强效果,特别是当血迹形成隆起形态时,可以观察到试剂在去除隆起的致密外壳后效果更好。在所选的四种化学增强试剂中,荧光素的表现尤为突出,即使在 641°C 的温度下加热 10 分钟,它对血迹也能保持有效。对于在 396°C 下加热 5 分钟和在 310°C 下加热 20 分钟的血迹,TMB 也表现出了显像能力。随后是 BLUESTAR®,而发光酚的表现最差。对血迹施加的热条件与增强技术的相应可视化效果之间的相关性为检测火灾现场的血迹提供了重要参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the methods of visualizing bloodstains after thermal exposure

To establish the correlation between thermal conditions imposed on bloodstains and visualizing effect of enhancement techniques, infrared photography and four chemical enhancement reagents were used to visualize bloodstains following thermal exposure. A black tile was selected as the substrate to intensify the visualization challenge, with a Cone Calorimeter serving as the standardized heating source to control thermal conditions. Compared with standard photography, infrared photography is proven to be a valuable complement to chemical reagents, showing significant advantages in visualizing bloodstains after thermal exposure. However, it is worth noting that infrared image fell short of standard image when bloodstains displayed raised, embossed morphology or when bloodstains almost disappeared under specific conditions. The enhancement effectiveness was found to be strongly correlated with thermal conditions imposed on bloodstains, and the morphology evolution of bloodstains during heating affected the chemical enhancement effect additionally, especially when the bulge morphology was formed, and it was observed that reagents were more effective after removing the dense shell of the bulge. Among the four selected chemical enhancement reagents, fluorescein performed exceptionally well, maintaining its effectiveness even for bloodstains heated at 641°C for 10 min. TMB demonstrated its visualizing ability for bloodstains heated at 396°C for 5 min and heated at 310°C for 20 min. BLUESTAR® followed afterwards, while luminol performed worst. The correlation between thermal conditions imposed on bloodstains and the corresponding visualizing effectiveness of enhancement techniques provides important references for detecting bloodstains at fire scenes.

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来源期刊
Journal of forensic sciences
Journal of forensic sciences 医学-医学:法
CiteScore
4.00
自引率
12.50%
发文量
215
审稿时长
2 months
期刊介绍: The Journal of Forensic Sciences (JFS) is the official publication of the American Academy of Forensic Sciences (AAFS). It is devoted to the publication of original investigations, observations, scholarly inquiries and reviews in various branches of the forensic sciences. These include anthropology, criminalistics, digital and multimedia sciences, engineering and applied sciences, pathology/biology, psychiatry and behavioral science, jurisprudence, odontology, questioned documents, and toxicology. Similar submissions dealing with forensic aspects of other sciences and the social sciences are also accepted, as are submissions dealing with scientifically sound emerging science disciplines. The content and/or views expressed in the JFS are not necessarily those of the AAFS, the JFS Editorial Board, the organizations with which authors are affiliated, or the publisher of JFS. All manuscript submissions are double-blind peer-reviewed.
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