Evidence map›Paper›PMID 41762241›Full record

ArticleInternational journal of legal medicine2026

Radiation dose reduction through short scan protocols and arms-out positioning in clavicular CT for forensic age estimation.

Thomas D Ruder, Wolf-Dieter Zech, Marc Alexander Schmid, Andreas Schmeling, Rebecca Straessle, Paolo Lombardo, Rainer J Egli, Martin Müller

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Article in International journal of legal medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Thomas D RuderInstitute of Diagnostic, Interventional and Pediatric Radiology, InselspitaI, Bern University Hospital, University of Bern, Rosenbühlgasse 27, Bern, CH-3010 , Switzerland. thomas.ruder@insel.ch.ORCID http://orcid.org/0000-0002-3110-9143
Wolf-Dieter ZechInstitute of Forensic Medicine, University of Bern, Bern, Switzerland.
Marc Alexander SchmidInstitute of Diagnostic, Interventional and Pediatric Radiology, InselspitaI, Bern University Hospital, University of Bern, Rosenbühlgasse 27, Bern, CH-3010 , Switzerland.
Andreas SchmelingInstitute of Legal Medicine, Münster, Germany.
Rebecca StraessleFamily Medicine Practice Rebstock, Ins, Switzerland.
Paolo LombardoInstitute of Diagnostic, Interventional and Pediatric Radiology, InselspitaI, Bern University Hospital, University of Bern, Rosenbühlgasse 27, Bern, CH-3010 , Switzerland.
Rainer J EgliInstitute of Diagnostic, Interventional and Pediatric Radiology, InselspitaI, Bern University Hospital, University of Bern, Rosenbühlgasse 27, Bern, CH-3010 , Switzerland.
Martin MüllerDepartment of Emergency Medicine, Bern University Hospital, InselspitaI, University of Bern, Bern, Switzerland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo assess the effect of scan length, partial humeral head inclusion, and body mass index (BMI) on radiation dose of CTs of the medial clavicular epiphysis (MCE) performed with elevated arms (arms-up).

methodsNinety consecutive MCE CTs acquired in an arms-up position for forensic age estimation were retrospectively analysed. Scans were grouped by scan length (short: ≤4 cm; long: >4 cm, rounded to the nearest cm) and by arm position (arms-out: humeral heads excluded; arms-in: humeral heads partially included). Dose-relevant parameters (effective tube current, volume CT dose index, CT dose length product, and effective dose) were compared. Adjusted geometric mean ratios (aGMRs) were calculated to quantify the association between radiation doses and scan length, arm inclusion, and BMI.

resultsPopulation: 88 males, 2 females; median (IQR) weight 62.0 kg (57.5-67.9), height 172 cm (168-178), BMI 21.1 kg/m² (19.5-22.4). Effective dose was lowest in short scans with arms-out (0.38 mSv, 0.32-0.43), highest in long scans with arms-in (0.49 mSv, 0.39-0.62), and equal in short scans with arms-in and long scans with arms-out (0.41 mSv, 0.36-0.46 and 0.34-0.46, respectively). Each additional centimetre of scan length increased dose by 8.3% (aGMR 1.083, 95% CI 1.036-1.132), each centimetre of humeral head inclusion by 6.8% (1.068, 1.046-1.090), and each BMI unit by 4.1% (1.041, 1.024-1.058).

conclusionsEffective dose was 22% lower in short scans with arms-out than in long scans with arms-in. Careful patient positioning and precise scan length planning substantially reduce radiation exposure in MCE CT for age estimation.

Indexed as

Age Determination by SkeletonClaviclePatient PositioningRadiation DosageTomography, X-Ray ComputedAdultBody Mass IndexEpiphysesFemaleHumansMaleMiddle AgedRetrospective StudiesYoung AdultArm positioningComputed tomographyForensic age estimationMedial clavicular epiphysisRadiation protection

Identifiers

PMID41762241
PMCPMC13275621

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.