Avaliação de uma nova metodologia de irradiação de mama esquerda na fase de inspiração
DOI:
https://doi.org/10.29384/rbfm.2016.v10.n2.p12-15Keywords:
tomografia, radioterapia, neoplasias da mamaAbstract
A radioterapia é a principal abordagem terapêutica para câncer de mama e envolve a exposição significante de coração e pulmões, principalmente nos casos de mama esquerda. A implementação de uma metodologia que reduza a dose nesses órgãos é importante para garantir melhor qualidade de vida à paciente. Este trabalho objetiva,então, avaliar redução de dose cardíaca e pulmonar quando se realiza o planejamento radioterápico considerando apenas a fase de inspiração. Três pacientes com mama esquerda presente foram tomografadas durante a respiração livre e sob monitoração respiratória, realizando-se o planejamento com base em cada uma. Os resultados obtidos mostraram uma redução na dose média cardíaca de 53%, em média. Quanto aos volumes pulmonares, obteve-se uma redução de, em média, 44,6% e 51% de pulmão esquerdo que recebeu 10Gy e 20Gy, respectivamente. Dessa forma, o estudo mostrou que o emprego do gating respiratório para a radioterapia de mama esquerda pode reduzir doses cardíacas e pulmonares.
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