Angie, everyone is different. Some here have worked all through the radiation, but I think most have not. I remember being very tired towards the end of treatment and doubt that if I had a job, that I would have been able to put in very many hours. I would guess that what the doctor told him is a bit unrealistic, but you never know -- your brother may be one of the ones who surprises everyone. It is good to hear that he is doing so well. You come back any time with qustions, and there will undoubtedly be someone here with an answer.