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41

Ahnesjö, Med. Phys.

22

p 267-278

Collimator scatter, cont…

- minor influence

%

30x30cm2

5x5cm2

15x15cm2

-15 -10 -5 0 5 10 15 20

0

1.0

-20

( )

coll

0

,

x y

0.8

0.6

0.4

0.2

Collimator scatter profiles 4 MV through isocenter

Off axis distance