Forensic 3D Documentation of Skin Injuries
News Dec 09, 2016
An accurate and precise documentation of injuries is fundamental in a forensic pathological context. Photographs and manual measurements are taken of all injuries during autopsies, but ordinary photography projects a 3D wound on a 2D space. Using technologies such as photogrammetry, it is possible to create 3D detailed, to-scale, true-color documentation of skin injuries from 2D pictures. A comparison between the measurements of 165 lesions taken during autopsies and on photogrammetrically processed pictures was performed. Different types of lesions were considered: 38 blunt force injuries, 58 sharp force injuries, and 69 gunshot injuries. In all cases, very low differences were found with mean ≤ 0.06 cm and median ≤ 0.04 cm; a mean difference of 0.13 cm was found for the blunt force injuries. Wilcoxon signed-rank test showed no statistically significant differences between the two measurement methods (p > 0.05). The results of intra- and inter-observer tests indicated perfect agreement between the observers with mean value differences of ≤ 0.02 cm. This study demonstrated the validity of using photogrammetry for documentation of injuries in a forensic pathological context. Importantly, photogrammetry provides a permanent 3D documentation of the injuries that can be reassessed with great accuracy at any time. Such 3D models may also be combined with 3D reconstruction obtained from post-mortem CT scans for a comprehensive documentation of the lesion (internal and external information) and ultimately used for virtual reconstruction.
Villa, C. (2016). Forensic 3D documentation of skin injuries. International Journal of Legal Medicine. doi:10.1007/s00414-016-1499-9
Scientists Decry Lack of Science in ‘Forensic Science’News
Many of the “forensic science” methods commonly used in criminal cases and portrayed in popular police TV dramas have never been scientifically validated and may lead to unjust verdicts, according to a recent article.
Drug Prevalence Means that Even Many Non-Users Have Them on Their FingerprintsNews
Scientists have found that drugs are now so prevalent that 13 per cent of those taking part in a test were found to have traces of class A drugs on their fingerprints - despite never using them.READ MORE
Robotics Takes Mass Spec to the Third DimensionNews
Within the past decade, many advancements have been made in the 3-D market from printing to movies. Now scientists report that by combining a robotic arm and mass spectrometry, they can analyze the surface of irregularly shaped 3-D objects, potentially opening up new branches of forensics and pharmaceutics.READ MORE