Target Volume Determination 2015

How do we define the GTV?

The GTV: CTV, MR or FDG-PET?

Tumor recurrence:  54% inside the GTV (FDG-PET)  96% inside the ≥66 Gy region.

66-68 Gy 60 Gy 50 Gy

Due et al. Radiat Oncol 2014;111:365-5.