Figure 1From: Dosimetric impact of target definitions on normal structures in head and neck cancerRepresentative patient demonstrating variation in planning target volumes (PTV) for two dose (RTOG) and three dose (3Dose) plans. Axial (A-B) and coronal (C-D) computed tomography images shown. The gross tumor volume (GTV, red line) is identical for each plan. The PTV-high dose (PTV-HD, orange) and PTV-elective dose (PTV-ED, cyan) are presented for RTOG in A and C, respectively. These volumes plus PTV-intermediate dose (PTV-ID, magenta) are displayed for 3Dose in B and D.Back to article page