Joel Bottoni , Thomas Rost , Holger Wittig , Melanie Bauer , Eva Scheurer , Claudia Lenz
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引用次数: 0
Abstract
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.
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.