L0_2016_Athens_Physics_Programme_V6

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ICRU 50 Width: 95%

Field definition width: 50%

+7% -5%

Profile data of a flattened treatment beam

Transversal (x)

Dose [Gy]

D

central axis

D

off-axis

Off-axis ratio (OAR

d

(x))=

D

off-axis

/D

central axis

air

water