Thanks for the reply David. I am sorry if the information I provided was inadequate--I thought the post should not get too long. Is there something specific you would find useful? A little bit more about the case is in my previous thread.

When we raised the question of why IMRT is not being used even when it's available, the doctors started to get defensive. Their explanations varied from "IMRT is used for higher doses" to "Since there isn't a well-defined tumour to irradiate, there is not much advantage to be had from IMRT". They also claim that my father (who accompanies my mother) was well-informed about both methods and given a choice.

Our hospital is rather crowded, and their IMRT equipment is burdened so that there is a long time one has to wait. I suspect they trick people into ignoring the IMRT option by not emphasizing the advantages.
As of now, they say we would have to wait long if we want to use IMRT there, and that allowing a gap is dangerous because the cancer-cells that have now tasted radiation may recover or mutate. Worse, other hospitals with IMRT also speak of long waiting periods before it can be administered.

If someone (Gary?) could shed more light on the dangers of leaving a gap between doses, it would be really helpful. Until then I'm trying to find the hospital which promises to start IMRT in the shortest time.

Thanks!