Dosimetry of occupational exposure in a hemodynamics room using a solid state detector
DOI:
https://doi.org/10.29384/rbfm.2024.v18.19849001782Keywords:
interventional radiology, hemodynamics, solid state detector, radiological protection, occupationally exposed individuals, effective doseAbstract
Interventional radiology procedures may lead to high doses for the professionals involved and they are among the highest occupational doses in hospital services. This exposure can be influenced by factors such as the professional's distance from the operating table, shielding, the parameters used and the size of the patient. The aim of this study was therefore to verify the effective doses of the multidisciplinary team and the number of annual procedures allowed, within the dose limits established by CNEN NN 3.01, by varying the dosimetric scenario. To make this, a solid-state detector was used to measure air kerma rates in simulations of head and abdomen procedures on a PMMA phantom, which were later converted into effective dose using the effective dose conversion factors per unit of air kerma available in ICRP 74. The results showed that increasing the distance between the professional and the operating table by 56 cm led to dose reductions of up to 85%, while the use of suspended lead glass reduced the effective dose by 99%. In addition, changing the thickness of the patient from 16 to 32 cm in diameter resulted in a 47-fold increase in the dose received by the main physician.
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Agradecimentos
Os autores agradecem o apoio financeiro da UFU e das agências de fomento: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Código de Financiamento 001; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) pelos projetos de pesquisa 3999459/2023-3 (F.B.C.), 161258/2023-9 (I.C.S.S.), 312160/2023-2 (L.P.N.), 312124/2021-0 (A.P.P.); 407493/2021-2; 403556/2020-1; Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG), por meio dos projetos APQ-04215-22, APQ-01254-23 e APQ-04348-23. S.P.S agradece à FAPEMIG pela Bolsa de Doutorado. Este trabalho faz parte do Instituto Brasileiro de Ciência e Tecnologia para Instrumentação Nuclear e Aplicações à Indústria e à Saúde (INCT/INAIS), projeto CNPQ 406303/2022-3.
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Copyright (c) 2024 Alessa Maschio, Felipe Beraldo da Cruz, Ingrid Cristina dos Santos Silva, Tainara Gabrieli Zandoná, Samara Pavan Souza, Cássio Vilela Komatsu, Lucio Pereira Neves, Ana Paula Perini
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