Monitoração interna in vivo de trabalhadores que manipulam Iodo -131 em um serviço de medicina nuclear de Curitiba

Abstract

Nuclear Medicine (NM) is a medical specialty that uses radiopharmaceuticais for the diagnosis ande treatment of various pathologies in human beings. Any ande all services that handle radioactive sources must be monitored ande supervised by the responsible body, which is the National Nuclear Energy Commission (NNEC) and the Institute of Radioprotection and Dosimetry (IRD). The monitoring of occupationally exposed individuals (OEI) is delegated and services that use these radioactive substances have the obligation to apply these acts in their routines during working hours. This work implemented individual monitoring of OEI into the routine of a NM service in Curitiba, thas is, it checked the amount of Iodine – 131 (¹³¹I) in the thyroids of workers who handle this, a gamma câmera was used exclusively and a phantom was used to simulate the thyroid–neck, obtained a positive result, that is, the sensitivity of the equipment was confirmed. Afterwards, monitoring was carried out on the two selected participants from the clinic,i.e. an image was taken of the neck region and the results of the committed effective dose of both workers were below 0.10 mSv. It is concluded that the values provided by the ROI of the monitoring images are below the limits established by the standards, proving that the selected employees do not have a significant amount of ¹³¹I in the thyroid.