Home Forums Melanoma Diagnosis: Stage IV Everything you want to know about the expanded access of PD1 Reply To: Everything you want to know about the expanded access of PD1

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KarenJ
Participant

Thank you, Pat, for passing on that info. The water-radiation explanation doesn’t make sense to me from a physics perspective. Water is a good moderator of particle radiation, but doesn’t do much to gamma radiation. Higher density material is more of a moderator to gamma and x-rays. But maybe there is some undesired lensing, making it harder to focus the beam. I’m not trying to be argumentative, just trying to understand.