Determinação da dose relativa de radiação ionizante na glândula tireoide utilizando diferentes protocolos em aparelhos panorâmicos

Abstract

Panoramic Radiographic (PR) is a radiographic exam that includes both dental arches in the same picture. Due to the wide field of view, unfortunately X-rays can affect other structures during the exam, such as the thyroid gland (TG). Aim: Evaluate discrepancies in ionizing radiation received taken by the TG during PR exams using pediatric anthropomorphic phantoms. Design: Two anthropomorphic phantoms, made from computed tomography, were used. They represent children of six and eleven years old and have a cavity in the GT region for insertion of dosimetric films. Each of the simulators ware submit to different pre-existing protocols in the PR device of the Dental Radiology Clinic of the University of Caxias do Sul (Orthopantomograph OP300 Kavo). The dosimetric films were manually processed and inserted into a luxmeter for their analysis and later to determine the optical density of the films, using the Python language in a Jupyter Notebook environment. Results: The smaller adult protocol had a lower radiation dose received compared to some children of protocols. The anthropomorphic phantom that presented the highest dose received was the six-yearold, particularly on the underside of the thyroid gland. Conclusion: The lack ofpediatric guidelines and protocols on panoramic devices can be caused by exacerbated radiation doses in children as well as their sensitive organs. Professionals in the area should seek the individuality of their devices, aiming at specific care for each patient. [resumo fornecido pelo autor]