Target Volume Determination 2015

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)

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ICRU 83