IMRT

Which assumptions are behind this formula?

σ +Σ = 7.0 5.2

Σ R

systematic setup errors random setup errors

σ

• round CTV moves around within idealized round dose distribution with idealized penumbra, which drops to zero to all sides • population-based uncertainties , effect quantized as TCP of a population

For the individual patient, the margin will be either too large, or too small…

ESTRO IMRT course 2015 Adaptive Radiotherapy Brussels October 8th, 2015

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