IMRT Course 2016

Dose calculation issues ‚in practice‘

Some examples for situations which need special care:

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small fields, irregular shaped fields (esp. off-axis), …

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]

ESTRO IMRT course 2016

Dose Calculation in Static and Rotational IMRT

London April 7th, 2016

-51-

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potential systematic errors in measured base-data

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air in rectum

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dose calculation in lung in presence of breathing motion (‘4D’ dose)

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dose absorption in the patient table/couch

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dose calc in presence of CT artifacts: dental&hip implants

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HU errors in CT-calibration