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Radiation Protection Dosimetry 2005 114(1-3):164-167; doi:10.1093/rpd/nch508
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

Effective dose calculations in conventional diagnostic X-ray examinations for adult and paediatric patients in a large Italian hospital

Gaetano Compagnone*, Laura Pagan and Carlo Bergamini

Medical Physics Department, S. Orsola-Malpighi Hospital, Via Massarenti 9, 40138 Bologna, Italy

* Corresponding author: gcompa{at}med.unibo.it

The effective dose E is an efficient and powerful parameter to study the radioprotection of the patient. In our hospital, eight radiological departments and more than 100 radiological X-ray tubes are present. The effective doses were calculated for adults and paediatric patients in 10 standard projections. To calculate E, first the entrance skin dose (ESD) was evaluated by a mathematical model that was validated by >400 direct measurements taken with an ionisation chamber on four different phantoms: the overall accuracy of the model was better than 12%. Second, to relate ESD to E, conversion coefficients calculated by Monte Carlo techniques were used. The E-values obtained were of the same order as those presented in the literature. Finally, we analysed how the study of E distributions among the various radiological departments can help to optimise the procedures, by identifying the most critical examinations or sub-optimal clinical protocols.


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