Ces radiol. 2013, 67(3):225-231

Evaluation of the average annual effective dose and average annual equivalent dose to the hands of the staff of Department of Nuclear Medicine University Hospital in the years 2006-2012Original article

Jana Hudzietzová¹, Michal Koláček², Lenka Ullmannová², Jozef Sabol¹, Otakar Kraft^2,3

¹ České vysoké učení technické v Praze, Fakulta biomedicínského inženýrství

² Klinika nukleární medicíny FN, Ostrava

³ Lékařská fakulta Ostravské univerzity, Ostrava

Aim: The aim of the study was a retrospective analysis to assess the radiation burden in terms of annual average effective dose equivalent and average effective dose to the hands from the fingers to the forearm of some staff of Department of Nuclear Medicine University Hospital Ostrava (KNM FNO) in 2006-2012.

Method: For the assessment of the annual average effective dose, the results of personal monitoring have been used. To determine the average dose equivalent to hand from the fingers to the forearm monitoring data from finger dosimeters were used. In both cases one month monitoring period was applied.

Results: For radiological assistants and nurses with certification in the field of nuclear medicine working in the ER KNM FNO, the average effective dose in years 2006, 2007, 2008, 2009, 2010, 2011 and 2012 was 2.1 mSv, 2.4 mSv, 1, 7 mSv, 1.7 mSv, 1.6 mSv, 1.1 mSv and 1.1 mSv, respectively. In case of pharmacists, the average effective dose for the same period was 1.4 mSv, 1.4 mSv, 0.8 mSv, 0.8 mSv, 1.0 mSv, 0.8 mSv and 0.9 mSv. Nurses in the ward received the average effective dose in the same period 0.5 mSv, 1.0 mSv and 0.4 mSv, 0.4 mSv and 0.7 mSv, 0.5 mSv and 0.9 mSv. Doctors at the clinic received the average effective dose 1.7 mSv, 1.8 mSv, 1.5 mSv, 1.7 mSv, 2.0 mSv, 1.8 mSv and 1.3 mSv. The average effective dose for physicists and technicians was 0.5 mSv, 0.6 mSv, 0.2 mSv, 0 mSv, 0 mSv, 0 mSv and 0.4 mSv. The average dose equivalent to hand of pharmacists in the years 2006-2012 amounted to 66.7 mSv, 43.0 mSv, 71.9 mSv, 93.2 mSv, 100.4 mSv, 103.3 mSv and 115. 0 mSv. The doctors at the clinic, who were monitored from 2009 to the present, have received the average dose equivalent to hands 9.1 mSv, 8.0 mSv and 10.0 mSv.

Conclusion: In all groups (radiographers and nurses with the certification in the field of nuclear medicine, the clinicians, pharmacists, physicists and technicians) some downward trend in variable average effective dose was observed, despite the fact that the workload in terms of tests performed was showed annually increasing trend with a similar situation as far as radiotherapy was concerned. In contrast, the average equivalent dose to hands lead to the increase which can be attributed to the increasing amount of activities of radiopharmaceuticals processed at the KNM FNO.

Keywords: nuclear medicine, personnel monitoring, effective dose, equivalent dose, radiation protection

Grants and funding:

Referát byl připraven za částečné podpory poskytnuté v rámci projektu SGS13/161/OHK4/2T/17.

Accepted: May 15, 2013; Published: September 1, 2013  Show citation