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Comparison of radiation doses to patients undergoing standard radiographic examinations with conventional screen–film radiography, computed radiography and direct digital radiography

¹ Medical Physics Department, ² Accident and Emergency Department, S. Orsola-Malpighi Hospital, Via Massarenti 9, 40138 Bologna, Italy

New flat-panel direct digital radiography equipment has recently been installed in our Accident and Emergency Department; its characteristics and versatility are well suited to the work undertaken in this environment. The aim of this study was to compare radiation doses to patients undergoing standard radiographic examinations using conventional screen–film radiography, computed radiography and direct digital radiography; entrance surface dose and effective dose were calculated for six standard examinations (a total of 10 projections) using standard patient exposure parameters for the three imaging modalities. It was found that doses for computed radiography (all examinations) were higher than the doses for the other two modalities; effective doses for direct digital radiography were 29% and 43% lower than those for screen–film radiography and computed radiography, respectively. The image quality met the criteria in the European guidelines for all modalities.

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