735 / 1481
Recommended CTV-PTV margins for conformal EBRT:
•
Compensate internal motion and deformation and set-up errors
•
For primary CTV 15 - 20 mm
•
For nodal regions 7 - 10 mm
•
Usually position verification on bony landmarks, off-line protocol
•
So far no recommendations for CTV-ITV margins
5)
ITV
FOR INTACT CARCINOMA OF THE CERVIX