Figure 1.
Isodose distributions for a representative NPC patient (stage cT1N2M0) in the volumetric modulated arc therapy (VMAT) plan (left) and step and shoot intensity modulated radiation therapy (s-IMRT) plan (right), indicating the PTV-7000 (red), PTV-6000 (pink), PTV-5600 (light blue).
Figure 2.
Average dose volume histograms for all 52 NPC patients according to the step and shoot intensity modulated radiation therapy (s-IMRT) plans and volumetric modulated arc therapy (VMAT) plans.