Comparison of different iterative CT reconstruction techniques and filtered back projection for assessment of the medial clavicular epiphysis in forensic age estimation

Magdalini Tozakidou, Ilze Apine, Kay U. Petersen, Julius Matthias Weinrich, Sebastian Schindera, Eilin Jopp-van Well, Klaus Püschel, Jochen Herrmann

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

PURPOSE: To assess the impact of iterative reconstruction and filtered back projection (FBP) on image quality in computed tomography (CT)-based forensic age estimation of the medial clavicular epiphysis.

METHODS AND MATERIALS: CT of the clavicle was performed in 19 patients due to forensic reasons (70 mAs/140 kVp). Raw data were reconstructed with FBP and with an iterative algorithm at level 4 and 6. Clavicular ossification stage was determined by two radiologists in consensus, firstly on FBP reconstructed images and secondly after reviewing all reconstructions including iDose 4 and 6. In addition, the 3 reconstructions were compared regarding artefacts and delineation of the meta-/epiphyseal interface. Quantitative image noise was measured.

RESULTS: Quantitative noise was lower in iDose 6 reconstructed images than in FBP (P < 0.042), but not significantly lower between iDose 4 and FBP (P = 0.127). Side by side comparison revealed lesser qualitative image noise on both iDose reconstructed images than for FBP. The meta-/epiphyseal interface delineation was rated better on both iDose levels than with FBP. In 3 of 19 patients, the clavicular ossification stage was reclassified after iterative reconstructions had been additionally reviewed.

CONCLUSION: Using iterative CT reconstruction algorithms, a reduction of image noise and an enhancement of image quality regarding the meta-/epiphyseal clavicular interface can be achieved. The study highlights the importance of image standardization as variation of reconstruction technique has impact on forensic age estimation.

Original languageEnglish
Pages (from-to)355-361
Number of pages7
JournalInternational Journal of Legal Medicine
Volume134
Issue number1
DOIs
Publication statusPublished - 1 Jan 2020
Externally publishedYes

Keywords

  • Adolescent
  • Adult
  • Age Determination by Skeleton/methods
  • Algorithms
  • Clavicle/diagnostic imaging
  • Epiphyses/diagnostic imaging
  • Humans
  • Image Processing, Computer-Assisted/methods
  • Male
  • Osteogenesis
  • Radiation Dosage
  • Retrospective Studies
  • Signal-To-Noise Ratio
  • Tomography, X-Ray Computed/methods
  • Young Adult

Field of Science

  • 3.2 Clinical medicine

Publication Type

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database

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