Mobile markerless augmented reality and its application in forensic medicine

Mobile markerless augmented reality and its application in forensic medicine
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移动无标记增强现实及其在法医学中的应用

DOI:
10.1007/s11548-014-1106-9
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发表时间:
2014
影响因子:
3
通讯作者:
Maier-Hein
Maier-Hein
中科院分区:
工程技术3区
文献类型:
--
作者:
Kilgus;Prüfer;Müller;Seitel;Fangerau;Iszatt;Schlemmer;Hornegger;Maier-Hein

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目的在尸检过程中,当今的法医病理学家主要依靠可见的指征、触觉和经验来确定死因。虽然CT数据通常可用于检查中的身体,但由于病理套件中缺乏放射学工作站,这些数据很少使用。这些数据可能会阻止法医病理学家破坏证据,因为它允许法医将外部创伤与内部伤害联系起来。为了促进这一点,我们提出了一种新的多模式直观可视化取证数据的方法,并对其可行性进行了评估。方法在平板电脑上安装一个距离摄像头,其定位方式是使摄像头同时捕获人体的深度和颜色信息。服务器基于CT和深度数据的表面配准来估计相机姿势,以允许直接在平板电脑上对内部解剖进行增强现实可视化。结果在尸检的初步研究中,我们使用附着在皮肤上的基准点来量化目标的平均配准误差mm。结论该系统具有移动性、无标记、直观和实时的特点,且具有足够的精度。它可以在尸检过程中使用增强现实和纹理表面来支持法医病理学家。此外,该系统能够提供多种形式的文件,以便在法庭上提交。尽管它处于初步的原型状态,但由于价格低廉和简单,它具有很大的潜力。
PurposeDuring autopsy, forensic pathologists today mostly rely on visible indication, tactile perception and experience to determine the cause of death. Although computed tomography (CT) data is often available for the bodies under examination, these data are rarely used due to the lack of radiological workstations in the pathological suite. The data may prevent the forensic pathologist from damaging evidence by allowing him to associate, for example, external wounds to internal injuries. To facilitate this, we propose a new multimodal approach for intuitive visualization of forensic data and evaluate its feasibility.MethodsA range camera is mounted on a tablet computer and positioned in a way such that the camera simultaneously captures depth and color information of the body. A server estimates the camera pose based on surface registration of CT and depth data to allow for augmented reality visualization of the internal anatomy directly on the tablet. Additionally, projection of color information onto the CT surface is implemented.ResultsWe validated the system in a postmortem pilot study using fiducials attached to the skin for quantification of a mean target registration error ofmm.ConclusionsThe system is mobile, markerless, intuitive and real-time capable with sufficient accuracy. It can support the forensic pathologist during autopsy with augmented reality and textured surfaces. Furthermore, the system enables multimodal documentation for presentation in court. Despite its preliminary prototype status, it has high potential due to its low price and simplicity.
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