Uncertainty in Temperature-Based Determination of Time of Death

Please always quote using this URN: urn:nbn:de:0297-zib-63818
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  • Temperature-based estimation of time of death (ToD) can be per- formed either with the help of simple phenomenological models of corpse cooling or with detailed mechanistic (thermodynamic) heat transfer mod- els. The latter are much more complex, but allow a higher accuracy of ToD estimation as in principle all relevant cooling mechanisms can be taken into account. The potentially higher accuracy depends on the accuracy of tissue and environmental parameters as well as on the geometric resolution. We in- vestigate the impact of parameter variations and geometry representation on the estimated ToD based on a highly detailed 3D corpse model, that has been segmented and geometrically reconstructed from a computed to- mography (CT) data set, differentiating various organs and tissue types. From that we identify the most crucial parameters to measure or estimate, and obtain a local uncertainty quantifcation for the ToD.

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Author:Martin Weiser, Bodo Erdmann, Sebastian Schenkl, Holger Muggenthaler, Michael Hubig, Gita Mall, Stefan Zachow
Document Type:ZIB-Report
Tag:determination of time of death; forensic medicine; heat transfer equation; sensitivity i.r.t. geometric resolution; sensitivity i.r.t. thermal parameters
MSC-Classification:35-XX PARTIAL DIFFERENTIAL EQUATIONS
92-XX BIOLOGY AND OTHER NATURAL SCIENCES
Date of first Publication:2017/05/02
Series (Serial Number):ZIB-Report (17-18)
ISSN:1438-0064