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Dose constraints
•
Current dose constraints based on non-
adaptive plans (ie 45-50 Gy to 0.5cc dose to GI
structures in hypofractionated regimen; 33-36
Gy to 0.5cc dose to proximal GI structures in
SBRT regimen)
•
These are not cumulative doses because we
don’t have technology to measure this
•
We don’t know what the real tolerance is!