Gynae BT_Lucknow_2018

Comparison of Various Parameters required for Target Definition / Contouring

Clinical examination

MR

CT

GTV

good

excellent

V poor

Outline of cervix

good

excellent

good

Uterine corpus invasion

poor

excellent

poor

Parametrium (normal & abnormal)

(good)

good

poor

Vaginal disease

excellent

Excellent for para- vaginal disease

poor

Various targets at brachytherapy on CT:

• GTV at Brachy: No visualization of residual tumor on CT

• HR - CTV: on CT feasible with Clinical & CT findings

• IR - CTV: safety margins to HR-CTV