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Backscatter into the monitor chamber

Liu et al Med, Phys. 27(4), 2009

Varian Clinac 2100C, 10MV

~

2%

• The effect is included in the measured output factors (

S

cp

,

S

c

), and thus in factor-based

dose per MU formalisms. But needs to be accounted for separately in model-based dose

per MU formalisms.