IMRT

Dose calculation issues ‚in practice‘

Even when using allegedly ‘precise’ dose calculation algorithms: DON’T TRUST YOUR DOSE TOO MUCH!

[i.e. always keep a critical eye on what is calculated]

Some examples for situations which need special care: • small fields, irregular shaped fields (esp. off-axis), … • potential systematic errors in measured base-data • air in rectum • dose calculation in lung in presence of breathing motion (‘4D’ dose) • dose absorption in the patient table/couch • dose calc in presence of CT artifacts: dental&hip implants • HU errors in CT-calibration

ESTRO IMRT course 2015 Dose Calculation in Static and Rotational IMRT Brussels October 8th, 2015

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