Porovnání radiační zátěže pracovníků při přechodu od roztoku 131l ke kapslím.

The treatment ofthe thyroid cancer with 1311 radioiodine is a medical method proven during tens of years. This method is prone to risk of external as well as internal irradiation for the staff of any department. The risk is from a direct contact with a radiopharmaceutical (Na131l), with an injected patient or with a waste. External and also internal irradiation can occur during routine work. The staff of radio pharmacy is placed at risk of direct contact because the radiopharmaceutical is prepared and the radioactive waste is processed here. Comparison of radiation burden of the staff during the change of medical form (from solution to capsules of 1311) was done based on the assessment of whole body and finger dosimeters and values acquired from the measurement of internal contamination of the thyroid gland. We chose a time interval from September 2012 to the end of August 2016 (9/2012 - 8/2014 solution of 131l and 9/2014 - 8/2016 capsules with 131l). The dosimetric results were also assessed in relation to injected radioactivity in these periods. Four radiographers and one radiological technician working in the Department of Nuclear Medicine and Endocrinology of the University hospital Motol were chosen to assess radiation burden. Contamination ofthe thyroid gland and also dose equivalent decreased in order of tens percents in these staffers after a shift of medical form to capsules. There was no significant change of radiation burden in other staff ofthe 2nd ward ofthe department. [ABSTRACT FROM AUTHOR]