比较可见光和红外线摄影对尸检血肿的观察效果。

IF 2.2 3区医学 Q1 MEDICINE, LEGAL

Forensic science international Pub Date : 2024-11-15 DOI:10.1016/j.forsciint.2024.112300

Joel Bottoni , Thomas Rost , Holger Wittig , Melanie Bauer , Eva Scheurer , Claudia Lenz

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引用次数: 0

摘要

摄影在法医学记录中至关重要。可见光摄影使用的是人眼的光谱（约 380-780 纳米），而红外线（IR）摄影捕捉的是肉眼看不见的波长（约 700-1100 纳米）。本研究旨在评估红外摄影在检测死者皮下血肿方面的可靠性。在对 23 名不同肤色的死者进行的尸检中，对 43 个血肿进行了评估；出于道德原因，脸部、颈部、手部或脚部的血肿未包括在内。我们使用两台不同的相机拍摄了标准化照片：尼康 D810（可见光）和尼康 D800E（改装了 700 纳米红外滤光片）。随后，切除包括血肿在内的组织样本。使用 Keyence VHX 5000 数码显微镜评估石蜡包埋样本的血肿密度。使用 Photoshop 对原始红外照片进行处理，以获得血肿最暗处和周围完整组织最亮处的色调值。对切除样本的目视检查证实，红外摄影准确描绘了 43 个血肿中的 100%，而使用可见光摄影时，只有 53.5% 的血肿清晰可见，46.5% 的血肿模糊不清。色调值与血肿的显微密度呈正相关，线性相关系数为 0.70（p＜0.05）。

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Comparison of visible-light and infrared photography for visualizing hematomas postmortem

Photography is essential in forensic medicine documentation. While visible-light photography uses the human eye's spectrum (approximately 380–780 nm), infrared (IR) photography captures wavelengths invisible to the naked eye (approximately 700–1100 nm). This study aimed to assess the reliability of IR photography in detecting subcutaneous hematomas in deceased individuals. In postmortem examinations of 23 individuals with different skin tones, 43 hematomas were evaluated; for ethical reasons, hematomas on the face, neck, hands, or feet were excluded. Standardized photographs were taken using two different cameras: a Nikon D810 (visible-light) and a Nikon D800E modified with a 700 nm IR filter. Subsequently, tissue samples including the hematomas were excised. Hematoma density was assessed on paraffin-embedded samples using a Keyence VHX 5000 digital microscope. Raw IR photographs were processed with Photoshop to obtain tonal values of the darkest hematoma spot and the brightest spot of the surrounding intact tissue. Visual inspection of the excised samples confirmed that infrared photography accurately depicted 100 % of the 43 hematomas, whereas using visible-light photography, only 53.5 % were well visible and 46.5 % poorly visible. Tonal values correlated positively with microscopic densities of the hematomas, yielding a moderate to strong linear correlation coefficient of 0.70 (p < 0.001). In conclusion, IR photography is highly reliable in visualizing subcutaneous hematomas and has clear advantages over visible-light photography. Our results suggest that IR photography could be valuable as an additional tool in depicting suspected hematomas in living individuals.

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来源期刊

Forensic science international 医学-医学：法

CiteScore

5.00

自引率

9.10%

发文量

285

审稿时长

49 days

期刊介绍： Forensic Science International is the flagship journal in the prestigious Forensic Science International family, publishing the most innovative, cutting-edge, and influential contributions across the forensic sciences. Fields include: forensic pathology and histochemistry, chemistry, biochemistry and toxicology, biology, serology, odontology, psychiatry, anthropology, digital forensics, the physical sciences, firearms, and document examination, as well as investigations of value to public health in its broadest sense, and the important marginal area where science and medicine interact with the law. The journal publishes: Case Reports Commentaries Letters to the Editor Original Research Papers (Regular Papers) Rapid Communications Review Articles Technical Notes.