Dataset Information

Clinical forensic height measurements on injured people using a multi camera device for 3D documentation.

ABSTRACT: Documenting the existence, size, position and shape of injuries is an important part of medical forensic examinations. In the photography of an injury, the documentation is limited to an approximation of size and position of the injury based on a ruler included in the image. The documentation of injuries can be improved with photogrammetry, which allows the creation of scaled 3D models of an injury that can be used to not only document and visualize the injury but also to match the injury with an injury-causing object. In this paper, the multicamera device "Botscan" was used to perform 3D whole-body documentation and measure the positions of injuries. A major advantage of 3D whole-body documentation compared to photography is that the former can be performed at a later stage of the investigation. This makes the whole-body 3D documentation of injuries an important tool for re-examination.

SUBMITTER: Sieberth T

PROVIDER: S-EPMC7669809 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Clinical forensic height measurements on injured people using a multi camera device for 3D documentation.

Sieberth Till T Ebert Lars C LC Gentile Simon S Fliss Barbara B

Forensic science, medicine, and pathology 20200712 4

Documenting the existence, size, position and shape of injuries is an important part of medical forensic examinations. In the photography of an injury, the documentation is limited to an approximation of size and position of the injury based on a ruler included in the image. The documentation of injuries can be improved with photogrammetry, which allows the creation of scaled 3D models of an injury that can be used to not only document and visualize the injury but also to match the injury with a ...[more]

PMID: 32656642

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Project description:Evidence acquisition, interpretation and preservation are essential parts of forensic case work that make a standardized documentation process fundamental. The most commonly used method for the documentation and interpretation of superficial wounds is a combination of two modalities: two-dimensional (2D) photography for evidence preservation and real-life examination for wound analysis. As technologies continue to develop, 2D photography is being enhanced with three-dimensional (3D) documentation technology. In our study, we compared the real-life examination of superficial wounds using four different technical documentation and visualization methods.To test the different methods, a mannequin was equipped with several injury stickers, and then the different methods were applied. A total of 42 artificial injury stickers were documented in regard to orientation, form, color, size, wound borders, wound corners and suspected mechanism of injury for the injury mechanism. As the gold standard, superficial wounds were visually examined by two board-certified forensic pathologists directly on the mannequin. These results were compared to an examination using standard 2D forensic photography; 2D photography using the multicamera system Botscan©, which included predefined viewing positions all around the body; and 3D photogrammetric reconstruction based on images visualized both on screen and in a virtual reality (VR) using a head-mounted display (HMD).The results of the gold standard examination showed that the two forensic pathologists had an inter-reader agreement ranging from 69% for the orientation and 11% for the size of the wounds. A substantial portion of the direct visual documentation showed only a partial overlap, especially for the items of size and color, thereby prohibiting the statistical comparison of these two items. A forest plot analysis of the remaining six items showed no significant difference between the methods. We found that among the forensic pathologists, there was high variability regarding the vocabulary used for the description of wound morphology, which complicated the exact comparison of the two documentations of the same wound.There were no significant differences for any of the four methods compared to the gold standard, thereby challenging the role of real-life examination and 2D photography as the most reliable documentation approaches. Further studies with real injuries are necessary to support our evaluation that technical examination methods involving multicamera systems and 3D visualization for whole-body examination might be a valid alternative in future forensic documentation.

Project description:BackgroundStandardization in tools and documentation of child abuse and intimate partner violence have proven helpful in completely documenting injuries and suspected abuse among these populations. Similar tools do not yet exist for older adults and elder abuse.ObjectiveTo (1) use insights from experts to develop a tool to assist clinicians in appropriately and completely documenting physical findings in injured older adults for potential future forensic investigation of abuse or neglect and (2) to assess the feasibility of incorporating this tool into clinical practice.DesignTwo-phase, exploratory qualitative study. Phase 1: individual interviews with elder abuse experts from various specialties in medicine and criminal justice. Phase 2: focus groups with anticipated end users of the tool.ParticipantsPhase 1 telephone-based key informant interviews were conducted with 11 elder abuse experts (2 detectives, 3 prosecutors, 1 forensic pathologist, 2 geriatricians, and 3 emergency medicine physicians). Phase 2 focus groups were conducted among emergency medicine (n = 10) and primary care (n = 8) providers.ApproachKey informant interviews were conducted telephonically while the two focus groups were held in-person at an emergency medicine site in New York, NY, and a primary care site in Los Angeles, CA.Key resultsExperts agreed that medical providers' documentation of geriatric injuries is usually inadequate for investigating alleged elder abuse/neglect. They highlighted elements needed for forensic investigation: initial appearance before treatment is initiated, complete head-to-toe evaluation, documentation of all injuries (even minor ones), and documentation of pertinent negatives. Several noted the value of photographs to supplement written documentation. End users identified practical challenges to utilizing a tool, including the burden of additional or parallel documentation in a busy clinical setting, and how to integrate it into existing electronic medical records.ConclusionA practical tool to improve medical documentation of geriatric injuries for potential forensic use would be valuable. Practical challenges to utilization must be overcome.

Dataset Information

Clinical forensic height measurements on injured people using a multi camera device for 3D documentation.

Publications

Clinical forensic height measurements on injured people using a multi camera device for 3D documentation.

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