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Updated: Apr 28, 2026

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation
Published on: September 4, 2017
Diagnostic reference levels and patient doses in computed tomography examinations in Greece
G Simantirakis1, C J Hourdakis2, S Economides2
1Licencing and Inspections Department, Greek Atomic Energy Commission, PO Box: 60092, Agia Paraskevi, Attiki 15310, Greece Department of Medical Physics,University of Athens, Medical School, Goudi, Athens 11527, Greece gsim@eeae.gr.
Abstract:
The purpose of this study is to present a national survey that was performed in Greece for the establishment of national Dose Reference Levels (DRLs) for seven common adult Computed Tomography (CT) examinations. Volumetric computed tomography dose index and dose-length product values were collected from the post-data page of 65 'modern' systems that incorporate tube current modulation. Moreover, phantom dose measurements on 26 'older' systems were performed. Finally, the effective dose to the patient from a typical acquisition during these examinations was estimated. The suggested national DRLs are generally comparable with respective published values from similar European studies, with the exception of sinuses CT, which presents significantly higher values. This fact, along with the large variation of the systems' dose values that were observed even for scanners of the same type, indicates a need for further patient protection optimisation without compromising the clinical outcome.
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