- Arm "A" is a single dose of stereotactic radiation given one time
- Arm "B" is five doses of stereotactic radiation given over five consecutive days
The amount of radiation in Arm A is the biological equivalent of the same dose received over five days with Arm B (it's not simply five times as much, but has to do with a lot of biology and a lot of math).
The study is to see, long term, what the side effect profile is with both arms.
I got news this morning that I have been randomized, and am being enrolled into Arm A (single dose) of the study. I expect to hear from them soon to go get a calibration CT scan so they can proceed with the single zap.
Note that during the zap, they will concurrently use a CT to adjust and verify in case anything has moved.
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