IMRT Course 2016

How large does the margin have to be?

systematic errors are more deleterious than random errors!

A typical ‘margin recipe’…:

σ +Σ = 7.0 5.2

R

Σ

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 2016 Adaptive Radiotherapy London April 7th, 2016

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