IMRT

How large does the margin have to be?

σ +Σ = 7.0 5.2 systematic errors are more deleterious than random errors!

A typical ‘margin recipe’…:

Σ R

systematic setup errors random setup errors

σ

M. van Herk et al. 2000: The probability of correct target dosage: dose-population histograms for deriving treatment margins in radiotherapy. IJROBP 47(4)

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

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