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1

st

problem with IMRT:

more beams

than 3DCRT

larger patient volume covered with beams

depending on dose-effect relation, higher risk

P(tumor)

dose

2 plans for the same prostate patient, total dose 78 Gy IMRT 5 beams, 3DCRT 3

beams

IMRT

3DCRT

43

Prediction of tumor induction risk

IMRT and prediction of tumor induction