Gynae BT_Lucknow_2018

Comparison of various parameters required for target definition / contouring

Clinical examination

MR

CT

GTV

good

excellent

poor

Outline of cervix

good

excellent

good

Uterine corpus invasion

poor

excellent

poor

Parametrium (normal & abnormal)

(good) Learning curve

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 protocol

• IR-CTV: safety margins to HR-CTV

• OAR: rectum, bladder and sigmoid