Estudo das doses absorvidas em técnicos durante os procedimentos de Pet com 18-FDG

Abstract

Positron emission tomography (PET) makes use of the labeling of tumor cells by means of radiopharmaceuticals coupled to glucose that is fractionated throughout the body, making it possible to verify the concentration of glucose in greater amounts in tumor tissues. With the intention of guaranteeing the safety of technicians exposed whenworking in PET examination facilities, exposure arising from the preparation of the radiopharmaceutical, administration to the patient, positioning and transport of patients to the collection room until the execution of the examination in the pet room. strict radiation control is imposed on the production of gamma rays during annihilations. From the results obtained in the computer simulation with the MCNPX code, based on the Monte Carlo Method, this project aims at an analysis regarding the amount of radiation doses absorbed by technicians who work in the process of performing PET exams in children with one, five and ten years at all times during the examination. At the end of the simulations, it was possible to calculate the average effective occupational doses. It was observed that the activity of 18F-FDG injected in pediatric patients, due to the patient's mass, will produce a lower average effective dose per procedure, compared to the other patients. It is expected that the results can serve as a reference for PET services, seeking to minimize the doses absorbed by technicians who work in nuclear medicine services on a daily basis.