ABSTRACT
In recent years, application of radioactive materials is developed fast for diagnosis and therapeutic purposes in nuclear medicine. Meanwhile, each worker on the basis of his organizational post, receives different amount of variation from various radioactive sources such as radiopharmaceuticals, radiopharmaceutical received patients, institute wastes like syringe, cotton soaked with polluted alcohol and so on. In this research work, the amount of absorbed dose of workers is measured in three nuclear medicine clinics in Guilan province. Among 35 workers investigated, 12 were chosen from clinic A, 13 from clinic B and 10 from clinic C. Workers' absorbed dose was measured using LiF: M,C,P thermo-luminescence dosimeter [TLD] made in special molds. These molds were fastened on their chest for two months. In order to minimize the uncertainty of outcoming results, there LiF dosimeters were used in each mold. This information is extracted using TLD reader and Win REMS software and finally the workers' average absorbed dose was calculated. The achieved results that workers' absorbed dose is the range of 0.94 to 14.6 mGy with the average of 2.2 mGy. The minimum absorbed dose was for the specialists of clinic C and the maximum absorbed dose was for the nurses in clinic A. The results also show that the maximum absorbed doses in all 3 clinics are received by nurses. In this study, the maximum amount of absorbed dose is related to nurses. This indicates that it is necessary to minimize the amount of patients exposure as well as workers' exposure, especially nurses, according to the basis ALARA principle, via accomplishing the laws, rules and standards of radiation protection and the proper use of hand equipments