Dose Course 2018_Flipping book

calculation techniques:

Calculation task – make dose out from given beam(s), a pencil kernel and the patient geometry

Theory: view the incident photon fluence as composed (i.e. a sum) of pencil beams, so summing pencil kernels in the same way should give give the dose

p

(

)

(

) ( 

)

 



, d d  



Reality:

, , D x y z

, x y

, x x y y z x − −

y

=







Field

• Do it fast! • Do it faster!! • Faster!!!!! • Consider inverse square law • Heterogeneties??? • Special cases of interest?

Energy fluence 