Dose Course 2018_Flipping book

Dose per MU formalisms: factor-based dose calculations

(

)

s cD ; , , d

SSD d

How do factor-based formalisms deal with:

M

• non-square collimator settings • fields shaped with blocks or MLCs • points off axis • modulation with hard wedges • modulation with ‘soft’ wedges • other modulations (IMRT fields) • Inhomogeneities

SSD

c

d

?

s

d