386 / 1694
Conclusions
•
There are many error sources in radiotherapy,
determine what they are in your department
•
Focus on correcting remaining systematic errors
•
Do not forget the doctor’s error – delineation, and CTV
•
IGRT does not eliminate all errors; carefully consider
the margins to be used
•
IGRT introduces some new errors and makes old
errors more important (where is the CTV?)
•
Margin recipes assume that you know ALL ERRORS
… USE AT YOUR OWN RISK