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this is not what you would normally call radiation to the brain
which even as gamma knife affects normal cells as well as abnormal cells.
This is a radionucleide which goes via the blood stream to the cells with the
NaI symporter pumps on them. Of course the radiation can affect some cells around those cells, but the amounts they need to use is tiny from what I understand.
I will try to find out more within the week about if there is a trial which will accept those who have already had external radiation therapy.
But don't give up on this--add it to your list to show the doctors and to give you HOPE
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