Dose Course Book

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0.6

0.8

1.0

CTV+2.5

Σ

90% of patients have CTV inside:

95% dose level

Relative dose

Location CDF

PTV designed so the delivered 95% dose

conform to the

CTV+2.5

Σ

edge. The delivered

dose is the planned dose blurred by

σ

.

Prescribed 95% dose

conformed to PTV edge,

planned dose ”shaped ” by

σ

p

5

0

5

10

15

0.0

0.2

0.4

CTV

PTV

Target ”radius”