Target Volume Determination 2015

How do we define the GTV?

The gross tumor volume (GTV) “There are currently no absolute standards of how to delineate the GTV.” Schmidt-Ulrich et al , 2006 • Independent of the irradiation techniques. • Influenced by the oncological considerations. • Using 3D imaging. • Done on a CT scan acquired at treatment conditions. • Represents a snapshot of the anatomy at a given time.

Defining the GTV:

ICRU report 83. 2010;10:41-46. Schmidt-Ulrich et al. In: Image-Guided IMRT. Springer ;2006:304.