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- W2900558673 abstract "Resumo Introducao A capacidade de a TC cardiaca fornecer um mapa anatomico preciso e excluir a presenca de trombo intracardiaco e conhecida. O objetivo deste estudo foi avaliar o impacto da otimizacao de protocolos e evolucao tecnologica nas doses de radiacao e contraste e na qualidade de imagem dos exames de TC cardiaca previa a ablacao de fibrilhacao auricular (FA). Metodos Registo prospetivo de doentes consecutivos de centro unico, foram incluidos os que fizeram TC cardiaca num contexto de avaliacao previa a ablacao de FA (n = 270), distribuidos em tres grupos: Grupo 1, constituido pelos primeiros 150 doentes; Grupo 2, os ultimos 60 doentes feitos no mesmo aparelho; Grupo 3, os primeiros 60 doentes do novo aparelho. Avaliamos a otimizacao do protocolo com base na dose de radiacao, no volume de contraste, na necessidade de aquisicao complementar e na avaliacao objectiva da qualidade de imagem (racios sinal/ruido, contraste/ruido e homogeneizacao de densidade AE/AAE). Resultados Houve uma reducao significativa da radiacao entre cada um dos grupos e da dose de contraste entre o primeiro e o ultimo grupo (G1: 5,6 mSv e 100 ml; G2: 1,3 mSv e 90 ml; G3: 0,6 mSv e 65 ml). Apesar das menores doses de radiacao e contraste, o Grupo 3 apresentou resultados significativamente melhores de qualidade de imagem (racios sinal/ruido 13,5; contraste/ruido 14,8; homogeneizacao de densidade 0,92). Conclusao A otimizacao de protocolos e a evolucao tecnologica permitiram reducoes significativas nas doses de radiacao e de contraste usadas na TC cardiaca pre‐ablacao de FA, sem prejudicar a qualidade de imagem." @default.
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- W2900558673 date "2018-11-01" @default.
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- W2900558673 title "Tomografia computorizada cardíaca prévia a ablação de fibrilhação auricular – efeitos da evolução tecnológica e otimização de protocolos" @default.
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- W2900558673 doi "https://doi.org/10.1016/j.repc.2018.03.011" @default.
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