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  • Question: I have received 54 greys of radiation therapy over six-and-a-half weeks for my brain tumor. The machine used was called Cobalt. What is the difference of using Cobalt vs a machine called linear accelerator? Also, how long can the above mentioned radiation have an effect on the tumor? More than 4 months after the last radiation day?
  • Answer:11/27/2002
    The distribution of the radiation is different. In general, there is less ability to perform sophisticated radiation on a cobalt machine. Details of the case would be helpful to determine the reason for cobalt.

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