Fig. 1From: Dose-escalation by hypofractionated simultaneous integrated boost IMRT in unresectable stage III non-small-cell lung cancerThe margin and the prescribed dose of planning target volume (PTV). GTV: the gross tumor volume; CTV: The clinical target volume; PTVG: the expansion of GTV with a 0.8-cm margin; PTVC: the expansion of CTV with a 0.8-cm marginBack to article page