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Radiation Protection Dosimetry 2005 114(1-3):131-134; doi:10.1093/rpd/nch535
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

Retrospective patient dose analysis of a digital radiography system in routine clinical use

Astrid Schuncke and Ulrich Neitzel*

Philips Medical Systems, Röntgenstrasse 24, D-22335 Hamburg, Germany

* Corresponding author: ulrich.neitzel{at}philips.com

The log files generated in the flat-panel detector based digital radiography systems (Philips Digital Diagnost) at 11 different hospitals were used to acquire data regarding the dose-area product (DAP) and the entrance air kerma (EAK) for all X-ray examinations performed in routine clinical use. A retrospective statistical analysis of the data with respect to the dose levels was performed for several examination types. The resulting average dose levels were compared with the diagnostic reference levels (DRLs). While for the same type of examination the median dose level at different hospitals could differ by up to a factor of 5, almost all the dose levels were found to be much below the published DRL. Only in one hospital for one type of examination (Thorax PA) the DRL for the DAP was slightly exceeded, while for the same site and examination the EAK was still below the DRL. In conclusion, examination log files can be used for retrospective dose analysis and correlation with DRLs.


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