ESTRO course Dose Modelling and Verification 2017

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Factor-based dose calculations basic dosimetric quantities
Relative depth dose (RDD, or PDD) at an SSD=SAD setup
) , ,(
) , ,(
) , ,(
ref ref
ref
ref ref SSD dsD
SSD ds D
SSD ds RDD 
SAD SSDref 
SAD
s
dref
Dref d
Dd
s
SAD
or
Relative depth dose, RDD
Percentage depth dose, PDD
100
) , ,(
) , ,(
) , ,(
ref ref
ref
ref  
SSD dsD
SSD d sD
SSD ds PDD