Radiation dose variability in critical thoracic organs during CT imaging: A multi-centre phantom dosimetry study

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dc.contributor.authorKesmezacar, Fahrettin Fatih
dc.contributor.authorGunay, Osman
dc.contributor.authorKayaokay, Duygu Tuncman
dc.contributor.authorYeyin, Nami
dc.contributor.authorDemirci, Ali
dc.contributor.authorKaracam, Songul Cavdar
dc.contributor.authorOksuz, Didem Colpan
dc.date.accessioned2026-04-04T13:34:51Z
dc.date.available2026-04-04T13:34:51Z
dc.date.issued2026
dc.departmentİnönü Üniversitesi
dc.description.abstractThis multicenter phantom-based study quantified organ-specific radiation doses delivered during routine thoracic CT using five clinical systems from four major manufacturers. A total of 70 TLD-100 dosimeters were calibrated and strategically positioned in an Alderson Rando (R) phantom to measure absorbed doses in the lungs, heart apex, atrium, and bilateral breasts. Marked dose variability was observed across scanners, driven by differences in tube current, CTDIvol, pitch, and the implementation of dose modulation strategies. Lung doses ranged from 4.60 to 22.51 mGy, heart apex doses from 4.15 to 23.15 mGy, atrial doses from 4.73 to 20.77 mGy, and breast doses from 3.17 to 22.01 mGy. The CT-2 system consistently yielded the highest organ doses, while the CT-1 demonstrated the most effective dose reduction. Comparative assessment with literature confirmed strong alignment of our measured values with published experimental and Monte Carlo-based studies. It can be concluded that significant dose reductions to radiosensitive thoracic organs are achievable through advanced modulation technologies and tailored protocol adjustments.
dc.description.sponsorshipIstinye University, Turkiye
dc.description.sponsorshipThis research project is funded by Istinye University, Turkiye.
dc.identifier.doi10.1016/j.radphyschem.2025.113174
dc.identifier.issn0969-806X
dc.identifier.issn1879-0895
dc.identifier.scopus2-s2.0-105010472372
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.radphyschem.2025.113174
dc.identifier.urihttps://hdl.handle.net/11616/109431
dc.identifier.volume238
dc.identifier.wosWOS:001533374900005
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofRadiation Physics and Chemistry
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250329
dc.subjectThorax CT
dc.subjectOrgan dose assessment
dc.subjectPhantom study
dc.subjectMulticenter dose variability
dc.subjectRadiation dose optimization
dc.titleRadiation dose variability in critical thoracic organs during CT imaging: A multi-centre phantom dosimetry study
dc.typeArticle

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