Pelletti Guido, Viel Guido, Fais Paolo, Viero Alessia, Visentin Sindi, Miotto Diego, Montisci Massimo, Cecchetto Giovanni, Giraudo Chiara
Legal Medicine and Toxicology, University-Hospital of Padova, Via Falloppio 50, 35121 Padova, Italy.
Department of Medical and Surgical Sciences, Institute of Legal Medicine, University of Bologna, Via Irnerio 49, 40126 Bologna, Italy.
Leg Med (Tokyo). 2017 May;26:1-5. doi: 10.1016/j.legalmed.2017.01.009. Epub 2017 Jan 25.
The analysis of macro- and microscopic characteristics of saw marks on bones can provide useful information about the class of the tool utilized to produce the injury. The aim of the present study was to test micro-computed tomography (micro-CT) for the analysis of false starts experimentally produced on 32 human bone sections using 4 different hand-saws in order to verify the potential utility of micro-CT for distinguishing false starts produced by different saws and to correlate the morphology of the tool with that of the bone mark. Each sample was analysed through stereomicroscopy and micro-CT. Stereomicroscopic analysis allowed the identification of the false starts and the detection of the number of tool marks left by each saw. Micro-CT scans, through the integration of 3D renders and multiplanar reconstructions (MPR), allowed the identification of the shape of each false start correlating it to the injuring tool. Our results suggest that micro-CT could be a useful technique for assessing false starts produced by different classes of saws, providing accurate morphological profiles of the bone marks with all the advantages of high resolution 3D imaging (e.g., high accuracy, non-destructive analysis, preservation and documentation of evidence). However, further studies are necessary to integrate qualitative data with quantitative metrical analysis in order to further characterize the false start and the related injuring tool.
对骨头上锯痕的宏观和微观特征进行分析，可以提供有关造成损伤所使用工具类别的有用信息。本研究的目的是测试微计算机断层扫描（micro-CT），以分析使用4种不同手锯在32个人类骨切片上实验性制造的起始锯痕，从而验证micro-CT在区分不同锯产生的起始锯痕方面的潜在效用，并将工具的形态与骨痕的形态相关联。每个样本都通过体视显微镜和micro-CT进行分析。体视显微镜分析能够识别起始锯痕，并检测每种锯留下的工具痕迹数量。通过整合三维渲染和多平面重建（MPR）的micro-CT扫描，能够识别每个起始锯痕的形状，并将其与致伤工具相关联。我们的结果表明，micro-CT可能是评估不同类别锯产生的起始锯痕的有用技术，它能提供具有高分辨率三维成像所有优点（如高精度、无损分析、证据保存和记录）的骨痕精确形态轮廓。然而，有必要进行进一步研究，将定性数据与定量测量分析相结合，以便进一步表征起始锯痕和相关致伤工具。
