Gynae BT_Lucknow_2018

I nter-fraction motion of primary GTV Target motion & Bladder filing effect during EBRT Van de Bunt et al 2008

5 consecutive MRI’s during EBRT

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• Impact of changes in bladder and bowel filling on position changes of uterus • Not only one organ is responsible

Low impact

GTV CTV PTV

Low impact

High impact of bladder and bowel

High impact of bladder

Courtesy : Ina Schulz, Utrecht