ESTRO course on Image Guided Radiotherapy in Clinical Practice 2018

Impact of MRI on prostate target delineation variation on the clinic

Beware that MRI/CT difference can occur due to different rectal/bladder filling Use a flat table top and same cushions CT prostate 1.4 x as MRI prostate in volume Less dose to apex, base of seminal vesicles Observer variation is smaller than impact of modality difference For prostate only MRI based delineation is superior to CT based delineation RT according to delineation of the prostate on MRI decreases dose to the rectal wall

ESTRO IG and Adaptive Course Parikh Budapest 2018