IMRT 2018

ART, setup and margins

Minimum dose to CTV is 95% for 90% of patients

- 10 % of the patients are underdosed - Increase margins for all patients - Replan to avoid systematic underdosage - Make patient individual margins (plan selection)

van Herk et al : Int J Radiat Oncol Biol Phys. 47:1121-35 (2000)