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Radiation Protection Dosimetry Advance Access published online on July 20, 2004
Radiation Protection Dosimetry, doi:10.1093/rpd/nch344
Copyright © 2004 Oxford University Press.
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Received April 23, 2004
Revised June 4, 2004
Accepted June 14, 2004

SCIENTIFIC AND TECHNICAL PAPER

DOSE PERFORMANCE EVALUATION OF A CHARGE COUPLED DEVICE AND A FLAT-PANEL DIGITAL FLUOROSCOPY SYSTEM RECENTLY INSTALLED IN AN INTERVENTIONAL CARDIOLOGY LABORATORY

Virginia Tsapaki 1, Sophia Kottou 2*, Nikolaos Kollaros 3, Paraskevi Dafnomili 3, Zinon Kyriakidis 3, Vassiliki Neofotistou 4

1 Medical Physics Department, Konstantopoulio Agia Olga Hospital, Athens, Greece
2 Medical Physics Department, Medical School, Athens University, Athens, Greece
3 Onassis Cardiac Surgery Center, 2nd Cardiology Department, Athens, Greece
4 Medical Physics Department, Regional Athens General Hospital ‘G.Gennimatas’, Athens, Greece

* To whom correspondence should be addressed. E-mail: skottou{at}med.uoa.gr.


  Abstract

The purpose of the study was to evaluate the dose performance of a flat-panel (FP) and an image intensifier (II) charge coupled device (CCD) digital fluoroscopy X-ray systems newly installed in an Interventional Cardiology (IC) department. Filter entrance dose rate, detector dose rate (during fluoroscopy) and filter entrance dose per image were measured at 70 cm from the focus using 2 mm copper sheets to mimic normal size patient. Image quality was also evaluated. The patient dose survey included 277 patients, which had either a Coronary Angiography (CA) or a Percutaneous Transluminal Coronary Angioplasty (PTCA). Dose area product (DAP), fluoroscopy time (T) and total number of frames (F) values were also collected. The results showed that both systems performed within international recommendations with the exception of higher cine radiation doses, stressing the fact that neither specific protocols of measurement nor reference values for digital equipment were provided by the official bodies.


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