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ESTRO IMRT course 2015
Dose Calculation in Static and Rotational IMRT
Brussels October 8th, 2015
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Dose calculation issues ‚in practice‘:
Dose calculation for lung lesions
In the ICRU concept the PTV is a
virtual,
non-anatomical
planning volume
generally extends into low density region:
lung tissue/air
What density should be used for planning,
so that reported PTV dose is well
representative for the dose-to-moving-
tumour?
A fundamental problem of the PTV-concept:
average density CT
based on RCCT
virtual density overwrite
???
as-is (no density
override)