Lower GI 2017

Pelvic OARs constraints: sparing the bowel

- V15 as strong predictor in a recent updated model by Robertson (2010) - Not confirmed in the NRG0822 controlled trial (!)…WHY ?

- Robertson study: 3DCRT 3 fields (pre & post-op) - NRG0822: IMRT (pre-op)

- Robertson study: bowel loops - NRG0822: «peritoneal space»

- Correlation between V40-V45 and V15 for 3DCRT