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Radiation exposure of Staff handling 18FluorineFluorodeoxyglucose in a new positron emission tomography/computed tomography centre


Lerato Mosima
Nathaniel Muzamhindo
Maryke Lundie
Beverley Summers

Abstract

Background: Positron emission tomography/computed tomography (PET/CT) is an imaging modality that combines images from high- energy gamma rays emitted by a positron emitting radiopharmaceutical and those from the CT component. The images are then used in  the diagnosis of severe diseases. Procedures with PET radiopharmaceuticals introduce a risk of high occupational radiation exposure to  staff handling them. 18Fluorine-Fluorodeoxyglucose ([18F] FDG) is the most commonly used PET radiopharmaceutical.


Aim: To determine  the radiation exposure of staff working at the PET/CT facility.


Setting: Academic hospital in Gauteng.


Methods: The study was  quantitative and descriptive. The radiation exposure data of participants were collected using  Polimaster®electronic pocket  dosimeters, ring dosimeters and thermoluminescent dosimeters. The participants’ workflow was tracked and the tasks that led to the  highest radiation exposure were identified.


Results: Radiopharmacists had 129 dispensing days with the resultant daily radiation  exposure ranging between 0.01 μSv and 0.32 μSv. The radiographers’ daily radiation exposure ranged between 7.08 μSv and 19.14 μSv.  Radiographers received the highest radiation dose during radiopharmaceutical injection (average = 1.86 µSv).


Conclusion: The study  found that staff working at a new PET/CT facility in Gauteng were not at risk of radiation exposure above the accepted annual limits,  which are 20 mSv per annum, averaged over 5 years, and with no more than 50 mSv in 1 year.


Contribution: The findings revealed the  need for continuous training in radiation protection measures for all staff working in the PET/CT facility.  


Journal Identifiers


eISSN: 2071-9736
print ISSN: 1025-9848