IMRT

effect of random errors - homogeneous precription %homogeneous%dose%distribu*ons%

100 95

Prescription Prescription blurred

m

m

80

σ

60

40

CTV

Dose (% of prescribed dose)

20

0

PET dilated

1%

−3

−2

−1

0

1

2

3

Position from center of tumor (cm)

2%

19%

3%