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Advisor(s)
Abstract(s)
Introdução – A dosimetria in vivo é útil na medição da dose administrada aos doentes durante o tratamento, avaliando diferenças significativas entre a dose prescrita e a dose administrada no volume alvo, bem como nos órgãos de risco. Objetivo – Comparar a dose medida com a dose calculada em doentes com tumores de mama com e sem filtro físico. Métodos – Realizaram-se medições da dose na pele, utilizando díodos tipo–p, para os campos tangenciais e respetivos field-in-field em 38 doentes. Resultados – Verificaram-se diferenças estatisticamente significativas nos campos tangenciais open (ρ=0,000). Discussão – Estudos reportam desvios sistemáticos significativos entre a dose calculada e a dose medida. Conclusão – Com este estudo conclui-se que não existe influência nas doses devido à presença do filtro físico.
ABSTRACT: Introduction – In vivo dosimetry is useful in measuring the dose administered to patients during treatment, assessing significant differences between the prescribed dose and the dose to the target volume and the organs at risk. Purpose – To compare the measured dose with the calculated dose in patients with breast tumours with and without physical wedge. Methods – Entrance dose measurements using p-type diodes were performed for tangential fields and relative field-in-field in all 38 patients. Results – Statistically significant differences in open tangential fields (ρ=0.000) were verified. Discussion – Studies report significant systematic deviations between planned and measured dose. Conclusion – With this study we conclude that there is no influence in the doses due to the presence of the physical wedge.
ABSTRACT: Introduction – In vivo dosimetry is useful in measuring the dose administered to patients during treatment, assessing significant differences between the prescribed dose and the dose to the target volume and the organs at risk. Purpose – To compare the measured dose with the calculated dose in patients with breast tumours with and without physical wedge. Methods – Entrance dose measurements using p-type diodes were performed for tangential fields and relative field-in-field in all 38 patients. Results – Statistically significant differences in open tangential fields (ρ=0.000) were verified. Discussion – Studies report significant systematic deviations between planned and measured dose. Conclusion – With this study we conclude that there is no influence in the doses due to the presence of the physical wedge.
Description
Keywords
Radioterapia Cancro da mama Dosimetria in vivo Díodos semicondutores Radiotherapy Breast cancer In vivo dosimetry Semiconductor diodes
Citation
Roma A, Ruas I, Sá AC, Coelho CM, Monsanto F, Carolino E, et al. Dosimetria in vivo em tumores de mama: comparação entre a dose medida e calculada. Saúde & Tecnologia. 2016;(15):34-8.
Publisher
Instituto Politécnico de Lisboa, Escola Superior de Tecnologia da Saúde de Lisboa