649 / 1031
OAR CONTOURING
Rectum bladder and sigmoid must be systematically
,
delineated using the outer contour for delineation.
These organs at risk can readily be seen on CT and MR.
MR delineation seems to be slightly easier (and more
accurate?).
D li
ti
f th t
t
it
li bl
e nea on o e ou er con our perm s a re a e
estimation of the dose actually delivered to 2 and 5cc of
the wall of the organ exposed to a high dose.