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Radiation Protection Dosimetry Advance Access originally published online on February 7, 2006
Radiation Protection Dosimetry 2005 117(1-3):204-210; doi:10.1093/rpd/nci718
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Does digital imaging decrease patient dose? A pilot study and review of the literature

V. Neofotistou1,*, V. Tsapaki2, S. Kottou3, A. Schreiner-Karoussou4 and E. Vano5

1 Medical Physics Department, Athens General Hospital, 154, Messogion Avenue, 11527 Athens, Greece
2 Medical Physics Department, Agia Olga Hospital, Athens, Greece
3 Medical Physics Department, Medical School, Athens University, Athens, Greece
4 Division Medical de la Radioprotection, Ministere de la Sante, Luxembourg
5 Medical Physics Department, Complutence University, Madrid, Spain

* Corresponding author: evaneof{at}otenet.gr

The potential for decreasing patient dose is one of the main arguments for the justification of the cost of digital imaging equipment. However, the literature review with respect to patient doses using digital imaging modalities, presents conflicting results. During this study, patients' entrance surface doses were measured for three simple radiographic examinations, in European centres equipped with a computed radiography digital system. Results showed that doses between centres varied from 30% for chest LAT to 250% for chest PA examination. With the digital image quality criteria still under discussion, and with the post-processing parameters and/or image documentations varying, any dose comparisons between conventional/digital systems, as well as dose comparisons between different centre using digital units, are difficult. Clinical trials are required in order to define reference levels associated with quality of digital image necessary to address specific clinical requirements.


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