787 / 1359
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.