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ESTRO IMRT course 2015
Adaptive Radiotherapy
Brussels October 8th, 2015
-11-
Which assumptions are behind this formula?
• 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…
σ
σ
Σ
+Σ =
7.0 5.2
R
systematic setup errors
random setup errors