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HR CTV contouring on CT: tips
Uppermost contour
Uterine vessels abutting
(i. v. contrast)
Inferior and superior extent
cervical borders
Superior:
Where uterus
indents, contour the next 1
cm - pointed shape (cone)
Inferior:
ring / ovoids level
Cervical length:
2.5 – 3 cm
Vaginal involvement:
add vaginal tissue involved clinically at BT.
Uterine involvement:
more challenging. Clinical / radiological information into account