Dose Course 2018_Flipping book

Dose per MU formalisms: model-based dose calculations

(

)

(

)

; , , ; , , D A x y z D A x y z M  =

M 

0



0

Dose engine calibration factor

Energy fluence of direct photons at isocentre in air

relates the MU to the direct energy fluence, commonly determined under ref erence calibration conditions

D

ref,meas

M

(

)

ref M D A x y z   =  ref ref 0 ; D A x y , , ; , , 

z M

 

ref

meas

(

)



 

D



ref

ref

ref

ref

0 calc

ref,calc

=



0