Post-mortem X-ray computed tomography (PMCT) identification using ante-mortem CT-scan of the sphenoid sinus

Lucile Deloire · Idris Diallo · Romain Cadieu · Mathieu Auffret · Zarrin Alavi · Julien Ognard +1 more

35 citations0/0 files storedJournal of Neuroradiology

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Forensic Anthropology and Bioarchaeology Studies Dental Radiography and Imaging Autopsy Techniques and Outcomes

Abstract

PURPOSE: To evaluate forensic identification of individuals through visual comparison of sphenoid sinus anatomical configuration using ante- and post-mortem CT-scans. METHOD AND MATERIALS: Ante- and post-mortem head CT-scan of 33 individuals were retrospectively collected. Ten head CT-scans were randomly selected from various neurological contexts and added to the ante-mortem group. Ten other head CT-scans were randomly selected from our post-mortem PACS and added to the post-mortem group. These CT-scans were assigned into 2 groups for analysis: an ante-mortem group (33 + 10) and a post-mortem group (33 + 10). For ethics and to avoid identification bias, CT-scans were anonymized - not showing any head structure but only sphenoid sinuses. An anatomical based classification system using the sphenoid sinuses anatomical variations was created according to anatomical and surgical literature. This classification was used by readers to identify in two different steps a maximum of matched and then unmatched scans. RESULTS: The first reader had a sensitivity of 100% [CI: 89.4%-100%] and a specificity of 100% [CI: 99.8%-100%]. Sensitivity and specificity were respectively 93.9% [CI: 79.8%-99.3%] and 99.9% [CI: 99.6%-100%] for the second reader. Positive and negative predictive values were respectively 100% [CI: 89.4%-100%] and 100% [CI: 99.8%-100%] for the first reader. Positive and negative values were respectively 96.9% [CI: 83.8%-99.9%] and 99.9% [CI: 99.7%-100%] for the second reader. Inter-reader variability was estimated by Cohen's kappa and an excellent agreement was found. CONCLUSION: We reported an excellent validity and reliability of subjective visual comparison of ante- and post-mortem CT-data using an anatomical based classification of the sphenoid sinus.

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References

1987Classification system of frontal sinus patterns by radiography. Its application to identification of unknown skeletal remains 2013Virtual anthropology and forensic identification using multidetector CT 2011Radiologic identification of disaster victims: A simple and reliable method using CT of the paranasal sinuses 1990Value of the frontal sinus in identification of unknown persons.2010Personal Identification Using the Frontal Sinus*2008Is post-mortem CT of the dentition adequate for correct forensic identification?: comparison of dental computed tomograpy and visual dental record 2016Validation of post mortem dental CT for disaster victim identification 2016Contribution of the computed tomography of the anatomical aspects of the sphenoid sinuses to forensic identification

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2020Three-dimensional superimposition of digital models for individual identification 2019Automatic forensic identification using 3D sphenoid sinus segmentation and deep characterization 2020Three-dimensional analysis of the maxillary sinus for determining sex and age in human identification 2021Computer-aided superimposition of the frontal sinus via 3D reconstruction for comparative forensic identification

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