Estimation of post mortem interval by tomographic images of intra-cardiac hypostasis

Abstract The determination of the post mortem interval (PMI) is important in many instances, especially in criminal investigations. So, we consider post mortem tomographic evaluation of intra-cardiac hypostasis as an additional method for such purpose. Tomographic images of the thoraces of the corps...

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Bibliographic Details
Published in:Journal of forensic and legal medicine 2016-02, Vol.38, p.111-115
Main Authors: Zerbini, Talita, da Silva, Luiz Fernando Ferraz, Lobato Baptista, Pedro Artur, Ikari, Eduardo Seigo, Rodrigues de Araujo, Marina, de André, Carmen Diva Saldiva, da Motta Singer, Julio, da Rocha, Francisco Marcelo Monteiro, Junior, Edson Amaro, Pasqualucci, Carlos Augusto Gonçalves, Saldiva, Paulo Hilario Nascimento
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Aged, 80 and over
Autopsies
Autopsy
Computed tomography
Death & dying
Female
Forensic
Forensic Pathology
Forensic sciences
Heart Atria - diagnostic imaging
Human remains
Humans
Hypostasis
Male
Middle Aged
Models, Cardiovascular
Pathology
Post mortem changes
Post mortem interval
Postmortem Changes
Prospective Studies
Tomography
Tomography, X-Ray Computed
Young Adult
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Summary:Abstract The determination of the post mortem interval (PMI) is important in many instances, especially in criminal investigations. So, we consider post mortem tomographic evaluation of intra-cardiac hypostasis as an additional method for such purpose. Tomographic images of the thoraces of the corpses of 23 patients who died in a hospital were obtained sequentially at one hour intervals to allow the analysis of changes in density due to hypostasis over time. The right and left atria, which appear in the mediastinal window, were selected for measurements of the average organ density. An exponential model was used to relate the difference between the attenuation coefficients of the anterior segment of the right atrium and the posterior segment of the left atrium to the PMI. In spite of the large variability of the data from this observational study, PMI estimates during the first 12 h after death can be estimated with a margin of error smaller than two hours. The results suggest that the difference between the attenuation coefficients stabilizes around 12 h  post mortem and may be used as an additional method to estimate the PMI.
ISSN:1752-928X
1878-7487
DOI:10.1016/j.jflm.2016.01.001