Dose Course 2018_Flipping book

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)

d

reference depth

ref

ref ref r c  reference field size/collimator setting

c

collimator setting

eqsq

(equivalent square)

s

field size at depth

(equivalent square)

eqsq d,

Calculation point at isocentre:

s

c

=

eqsq d,

eqsq