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Dose per MU formalisms:
factor-based dose calculations
(
)
SSD dscD
; , ,
Reference normalisation geometry
reference normalisation geometry could differ from
linac calibration geometry (but for simplicity in this
lecture we take the two to be the same)
Arbitrary treatment geometry
M
d
(
)
M
SSD d cD
ref
ref
ref
ref
;
,
d
SSD
ref
SSD
c
ref
ref
c
s
d
d