Dose Course Book

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Dose per MU formalisms:

factor-based dose calculations

(

)

SSD dscD

; , ,

d

How do factor-based formalisms deal with:

M

c

SSD

• non-square collimator settings

• fields shaped with blocks or MLCs

• modulation with hard wedges

• modulation with soft (dynamic/virtual) wedges

• other modulations (IMRT fields)

• Inhomogeneities

s

d

d

• points off axis

?