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DOI: 10.1055/a-2379-8785
Musculoskeletal System

Forensic Age Determination Using MRI Scans of the Ankle: Applying Two Classifications to Assess Ossification

Article in several languages: English | deutsch
Maximilian Frederic Wernsing
1   Department of Diagnostic and Interventional Radiology, Ulm University Hospital, Ulm, Germany (Ringgold ID: RIN27197)
,
Valesa Malokaj
1   Department of Diagnostic and Interventional Radiology, Ulm University Hospital, Ulm, Germany (Ringgold ID: RIN27197)
,
Sebastian Nico Kunz
2   Institute of Forensic Medicine, Ulm University Medical Faculty, Ulm, Germany (Ringgold ID: RIN199904)
,
Meinrad Beer
1   Department of Diagnostic and Interventional Radiology, Ulm University Hospital, Ulm, Germany (Ringgold ID: RIN27197)
,
Daniel Vogele 
1   Department of Diagnostic and Interventional Radiology, Ulm University Hospital, Ulm, Germany (Ringgold ID: RIN27197)
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Abstract

Purpose

In forensic age determination, e.g. for legal proceedings, exceeded age limits may be relevant. To investigate age-related differences in skeletal development, the recommendations of the Study Group on Forensic Age Diagnostics (AGFAD) rely on imaging techniques using ionizing radiation (including orthopantomograms and radiographs of the hand). Vieth et al. and Ottow et al. have proposed MRI classifications for epi-/diaphyseal fusion of the knee joint to determine different age limits. The aim of the present study was to verify whether these two classifications could also be applied to MRI of the ankle.

Materials and Methods

MRI images of the ankle from 333 patients (160 female, 173 male) ranging in age from 10 to 28 years were retrospectively analyzed. T1-weighted turbo spin-echo (TSE) sequences and T2-weighted fat-suppressed sequences were analyzed for the two classifications. The different ossification stages of the two classifications were determined and the corresponding chronological ages were assigned. In addition, gender-specific differences were analyzed. Intra- and inter-observer variability was determined using Cohen’s kappa.

Results

With the classification of Ottow et al., the completion of the 14th year of life could be determined in both sexes. With the classification of Vieth et al, the completion of the 14th year of life could be determined in both sexes and the 18th year of life in male patients. Intra-observer and inter-observer variability was very good and good, respectively (κ > 0.87 and κ > 0.72).

Conclusion

In the present study, it was also possible to use both classifications for MRI of the ankle joint. The method offers the potential of an alternative or at least supplementary radiation-free assessment criterion in forensic age estimation.

Key Points

  • MRI scans of the ankle can be used for forensic age determination.

  • Classifications developed for the knee joint can also be used on the ankle.

  • The applied classifications based on Vieth et al. and Ottow et al. can be used as an alternative or, at the least, an additional method when determining legally relevant age limits.

Citation Format

  • Wernsing MF, Malokaj V, Kunz SN et al. Forensic Age Determination Using MRI Scans of the Ankle: Applying Two Classifications to Assess Ossification. Fortschr Röntgenstr 2024; DOI 10.1055/a-2379-8785

Keywords

forensic age estimation - MRI - bone age - ossification stages

Supplementary Material



Publication History

Received: 19 April 2024

Accepted after revision: 29 July 2024

Article published online:
05 September 2024

© 2024. Thieme. All rights reserved.

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany

 

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