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ESTRO IMRT course 2015
Dose Calculation in Static and Rotational IMRT
Brussels October 8th, 2015
-49-
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), …
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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)
•
dose absorption in the patient table/couch
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dose calc in presence of CT artifacts: dental&hip implants
•
HU errors in CT-calibration
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]