2017_IGRT course book

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