IMRT Course 2016

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 2016 Dose Calculation in Static and Rotational IMRT London April 7th, 2016

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