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ESTRO IG and Adaptive
Course Parikh Budapest 2018
Delayed treatment: 7 x (5 x in 1 patient)
To obtain a more favorable anatomy in case of a very full
rectum, usually caused by gas pockets
Post-treatment CBCT 1pw:
1 fraction the selected plan was no longer suitable due to a
moving gas pocket
The weekly review:
Smaller margin could have been selected in 20% of fractions,
and a larger margin in 2% of fractions
No inconsistencies between the imaging system and
radiotherapy management system!
Results: Evaluation of plan selection
Slides courtesy of R de Jong