Níveis de referência de diagnóstico locais para tomografia computorizada em angola
Local diagnostic reference levels for computed tomography in Angola
DOI:
https://doi.org/10.70360/rccse.v.163Palavras-chave:
Angola, Tomografia Computorizada, Níveis de Referência de Diagnóstico, Produto Dose Comprimento, Índice de Dose em Tomografia Computorizada, Computed Tomography, Diagnostic Reference Levels, Radiation DoseResumo
Introdudção: A Tomografia Computorizada (TC) é uma técnica de diagnóstico por imagem em constante evolução, aumentando a necessidade de medidas de Proteção e Segurança Radiológica (PSR). Os Níveis de Referência de Diagnóstico (NRDs) auxiliam na otimização da dose de radiação. Há disparidades no uso da TC entre a Europa e África, sendo que Angola tem avançado na aquisição de tecnologia e sensibilização para a PSR, mas ainda não possui NRDs estabelecidos. Este estudo compara os NRDs praticados em Angola com os europeus para exames de TC Crânio-Encefálica (CE), Tórax e Coluna Lombar.
Materiais e Métodos: Foram analisados exames realizados na CSE, em Angola, utilizando o TC FujiFilm Scenaria View 64 cortes. Os parâmetros CTDIvol (Índice de Dose em Tomografia Computorizada) e DLP (Produto Dose Comprimento) foram selecionados em pacientes adultos (≥18 anos).
Resultados: O Indice de Massa Corporal (IMC) variou entre Tórax (22,5) e Coluna Lombar (25,3). Os valores médios de CTDIvol foram: CE (55,4), Coluna Lombar (21,0) e Tórax (2,2). O DLP foi maior na CE (950,3), seguido da Coluna Lombar (542,0) e Tórax (78,7). O aumento do IMC esteve associado ao aumento das doses de radiação.
Conclusão: As diferenças entre os valores praticados na Clínica Sagrada Esperança e os NRDs internacionais podem estar relacionadas a fatores que influenciam a dose necessária para imagens diagnósticas. Os valores praticados na CSE estão alinhados com níveis de referência na CSE, reforçando a importância da implementação dos NRDs para a proteção radiológica em Angola.
Abstract
Background: Computed Tomography (CT) is a constantly evolving imaging diagnostic technique, increasing the need for Radiation
Protection and Safety (RPS) measures. Diagnostic Reference Levels (DRLs) assist in optimizing radiation doses. There are disparities
in the use of CT between Europe and Africa, with Angola making progress in acquiring technology and raising awareness of RPS, but
it still lacks established DRLs. This study compares the DRLs practiced in Angola with European standards for Cranial-Cerebral (CC),
Thorax, and Lumbar Spine CT scans.
Materials and Methods: Exams performed at CSE in Angola were analyzed using the FujiFilm Scenaria View 64-slice CT scanner. The
CTDIvol (Computed Tomography Dose Index) and DLP (Dose-Length Product) parameters were selected for adult patients (≥18 years).
Results: Body Mass Index (BMI) ranged between Thorax (22.5) and Lumbar Spine (25.3). The mean CTDIvol values were: CC (55.4),
Lumbar Spine (21.0), and Thorax (2.2). The highest DLP was in CC (950.3), followed by the Lumbar Spine (542.0) and Thorax (78.7). An
increase in BMI was associated with higher radiation doses.
Conclusion: The differences between the values practiced at Clínica Sagrada Esperança and international DRLs may be related to
factors influencing the necessary dose for diagnostic imaging. The values practiced at CSE align with reference levels at CSE, reinforcing
the importance of implementing DRLs for radiation protection in Angola.
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