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ESTRO IG and Adaptive
Course Parikh Athens 2017
Impact of 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 MRI prostate
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