Fig. 3From: Dosimetric comparison between RapidArc and HyperArc techniques in salvage stereotactic body radiation therapy for recurrent nasopharyngeal carcinomaComparison of the mean dose-volume histograms for the HyperArc (HA) and RapidArc (RA) techniques. a-d Organs at risk (OAR); X axis, relative dose, the percentage of the prescription dose; Y axis, ratio of OAR volumes, the volume percentage of the OARBack to article page