54 / 1311
Target volumes - GTV
•
ICRU 83 suggests specifying the modality
used to delineate the GTV
•
Primary rectal tumour (prone)
•
1. GTV-T (CT)
•
2. GTV-T (MRI T1 fat sat)
•
3. GTV-T (FDG-PET)
•
4. GTV-T (F-miso-PET)
•
Pre-RT so GTV-T (CT, 0 Gy)
1
2
3
4
ICRU 83