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Dose per MU formalisms:

factor-based dose calculations

Isocentric linac

reference

normalisation

geometry

Step 1:

account for differences in dose at the calculation point due to changes

in energy fluence from the different scatter conditions in the head of the linac

• Step 2:

• Step 3:

d

ref

c

ref

SAD

d

ref

c

SAD

c

ref

c

SAD

d

?