Figure 2From: Single arc volumetric-modulated arc therapy is sufficient for nasopharyngeal carcinoma: a dosimetric comparison with dual arc VMAT and dynamic MLC and step-and-shoot intensity-modulated radiotherapyThe average DVH to the OARs of 20 NPC patients. (a) The average DVH for all the PTVs comparing the four plan groups. (b-d) the average DVH to OARs of the four plan groups.Back to article page