Ces radiol. 2013, 67(1):87-94

Radiation burden of the personnel of the Clinic of Nuclear Medicine and Endocrinology of the 2nd Faculty of Medicine, Charles University and Hospital Motol, in years 2006-2011Original article

Jana Hudzietzová¹, Dana Prchalová², Jozef Sabol¹, Petr Vlček²

¹ České vysoké učení technické v Praze, Fakulta biomedicínského inženýrství, Kladno

² Klinika nukleární medicíny a endokrinologie, 2. LF UK a FN Motol, Praha

Aim: The intention of the paper was the assessment of radiation burden at the Clinic of Nuclear Medicine and Endocrinology 2nd LF UK and FN Motol (KNME) during the period of 2006-2011 together with the examination of the level of radiation protection. The determination of radiation burden at this workplace was based on the retrospective study relying on relevant monitoring data and results.

Method: Monitoring results of the personnel of the KNME are covering the period of 2006-2011. Using personal and finger dosimeters the average collective effective dose and average collective equivalent dose related to fingers up to forearms have been assessed. Until March 2009 the monitoring was carried out by the National Personal Dosimetry Service in Prague while as of April this monitoring was performed by VF Ltd. In both cases the monitoring interval was one month. The average activities of used radiopharmaceuticals (including ^99mTc, ¹¹¹In, ¹⁵³Sm, ¹²³I, ¹³¹I) was in the range of 2.79-5.900 GBq.

Results: The average collective effective dose of radiological assistants and nurses certified in nuclear medicine in individual years, namely 2006, 2007, 2008, 2009, 2010 and 2012 was 1.14 mSv, 1.39 mSv, 1.29 mSv, 0.99 mSv, 1.17 mSv a 1.11 mSv, respectively. During the same period the personnel working in the radioiodine laboratory received average collective effective dose 0.29 mSv, 0.82 mSv, 0.52 mSv, 0.17 mSv, 0.36 mSv a 0.50 mSv. The average collective effective dose of nurses at the 2^nd Ward was reported to be in those years 0.73 mSv, 0.35 mSv, 0.22 mSv, 0.21 mSv a 0.39 mSv. With respect to extremities, the average collective equivalent dose of the personnel in the radiopharmaceutical laboratory was thought out the above mentioned period was as follows 23.00 mSv, 23.99 mSv, 23.19 mSv, 55.75 mSv, 167.81 mSv a 136.00 mSv while the average collective equivalent dose received by radiological assistants on ambulance and certified on ambulance nurses amounted to 4.35 mSv, 2.86 mSv, 0.88 mSv, 1.99 mSv, 3.48 mSv a 6.24 mSv. The average collective equivalent dose to extremities of workers from the radioiodine laboratory during the period of 2006, 2007, 2008, 2009, 2010 a 2011 was 20.70 mSv, 18.21 mSv, 22.79 mSv, 44.76 mSv, 44.98 mSv a 54.03 mSv, respectively.

Conclusion: The results of personal as well as finger dosimeters have been found to be below the relevant dose limits set by the Regulatory Authority although over some of the recent years the exposure of workers has slightly been increasing which apparently is related to the increased number and variety of diagnostic and therapeutic procedures. Taking into account the results presented, it can be concluded that radiation protection at the KNME is in full compliance with the requirements of the State Office for Nuclear Security.

Keywords: Nuclear medicine, personnel monitoring, exposure of the personnel, radiation protection

Grants and funding:

Referát byl připraven za částečné podpory poskytnuté v rámci projektu: Popularizace VaV CZ.1.07/2.3.00/35.0046.

Accepted: July 30, 2012; Published: March 1, 2013  Show citation