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Dose per MU formalisms:
factor-based dose calculations
Nomenclature used in this presentation
(in analogy, but not identical, to that in AAPM Task group report 71)
collimator setting
(equivalent square)
eqsq
c
s
ref
ref
r c
≡
reference field size/collimator setting
ref
d
reference depth
eqsq d,
field size at depth
(equivalent square)
eqsq
eqsq d,
c
s
=
Calculation point at isocentre: