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Patient Dose Assessment for Common Digital Diagnostic Radiology Examination in Qatar

I Duhaini

I Abdallah, S Al mana, I Duhaini*, H Al Naemi, Hamad Medical Corporation, Doha, doha

SU-E-P-18 Sunday 3:00PM - 6:00PM Room: Exhibit Hall

Purpose: The aim of this study was to estimate radiation doses to patients undergoing standard radiographic examinations using Computed Radiography and Direct Digital Radiography in two hospitals within Hamad Medical Corporation in Qatar and compared with regional and international DRLs.

Methods:Data on 3391 patients were recorded from deferent X-ray HMC hospital to provide information on Qatar patient demographic information. Entrance Skin Dose (ESD) was measured for 1046 patients for the most five common X-ray examinations (a total of 7 projections) namely: Skull, Chest, Abdomen, Lumbar Spine and Pelvis. Exposure factors such as kV, mAs and Focal to Skin Distance (FSD) were recorded for each patient. Tube Output was measured for a range of selected kV values. ESD for each individual patient was calculated using the tube output and the technical exposure factors for each examination.

Results:HMC patient demographic data evaluated from this study were: average age of 39 years, mean weight of 74 kg and mean height of 165 cm. in Qatar state. The most performed procedure during the time of this study was chest PA (52%), and the least procedure performed was skull AP/LAT (1%) examination. The mean ESD values found to be generally lower than the published values. With exception of abdomen examinations at HGH hospital, mean ESD values were found to be within the established IAEA (DRL).

Conclusion:The mean ESD values at HGH were found to be much higher than that at AKH for abdomen, Lumber spine AP, Lumber Spine LAT and pelvis. The mean ESD values obtained in this was compared with values from the literature and found to be generally lower than the published values.
The results will be used to optimize patient doses in all HMC and can be used with more data from other private clinics to establish national dose reference levels for Qatar.

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