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International Journal of Legal Medicine

, Volume 133, Issue 4, pp 1159–1165 | Cite as

An innovative 3D-3D superimposition for assessing anatomical uniqueness of frontal sinuses through segmentation on CT scans

  • Daniele GibelliEmail author
  • Michaela Cellina
  • Annalisa Cappella
  • Stefano Gibelli
  • Marta Maria Panzeri
  • Antonio Giancarlo Oliva
  • Giovanni Termine
  • Danilo De Angelis
  • Cristina Cattaneo
  • Chiarella Sforza
Original Article

Abstract

Anatomical uniqueness plays a significant role in the personal identification process of unknown deceased. Frontal sinuses have been widely used in the past decades for this purpose, mostly using 2D X-ray techniques. However, the modern 3D CT-based segmentation methods may help in developing novel and more reliable methods of identification. This study aims at assessing the anatomical uniqueness of frontal sinuses through the 3D model registration. Thirty subjects who underwent two maxillofacial CT scans (interval: 1 month to 5 years) were selected from a hospital database. Frontal sinuses were automatically segmented through ITK-SNAP open source software and the 3D models belonging to the same patient were automatically superimposed according to the least point-to-point difference between the two surfaces. Two hundred patients were randomly selected from the same database and undergo the same procedure to perform 200 superimpositions of frontal sinuses belonging to different individuals, equally divided between males and females (mismatches). Statistically significant differences of average root mean square (RMS) point-to-point distance between the group of matches and mismatches, as well as possible differences according to sex, were assessed through Mann-Whitney U test (p < 0.05). In the group of matches, RMS ranged between 0.07 and 0.96 mm (mean RMS 0.35 ± 0.23 mm), while in the group of mismatches, it ranged between 0.96 and 10.29 mm (mean RMS 2.59 ± 1.79 mm), with a statistically significant difference (p < 0.0001). Neither the matches nor the mismatches group showed statistically significant differences according to sex. This study proposes a novel 3D approach for the assessment of anatomical uniqueness of frontal sinuses, providing both morphological and quantitative analysis, and a new method of identification based on 3D assessment of frontal sinuses, applicable when ante-mortem CT scans are available.

Keywords

Personal identification Frontal sinuses 3D segmentation CT scan Volumetric analysis 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Daniele Gibelli
    • 1
    Email author
  • Michaela Cellina
    • 2
  • Annalisa Cappella
    • 3
  • Stefano Gibelli
    • 4
  • Marta Maria Panzeri
    • 5
  • Antonio Giancarlo Oliva
    • 2
  • Giovanni Termine
    • 4
  • Danilo De Angelis
    • 3
  • Cristina Cattaneo
    • 3
  • Chiarella Sforza
    • 1
  1. 1.LAFAS, Laboratorio di Anatomia Funzionale dell’Apparato Stomatognatico, Dipartimento di Scienze Biomediche per la SaluteUniversità degli Studi di MilanoMilanItaly
  2. 2.Reparto di Radiologia, Ospedale FatebenefratelliASST Fatebenefratelli SaccoMilanItaly
  3. 3.LABANOF, Laboratorio di Antropologia e Odontologia Forense, Dipartimento di Scienze Biomediche per la SaluteUniversità degli Studi di MilanoMilanItaly
  4. 4.Reparto di Otorinolaringoiatria, Ospedale FatebenefratelliASST Fatebenefratelli SaccoMilanItaly
  5. 5.Reparto di Radiologia DiagnosticaIRCCS Ospedale San RaffaeleMilanItaly

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