Fig. 4From: Dosimetric comparison between RapidArc and HyperArc techniques in salvage stereotactic body radiation therapy for recurrent nasopharyngeal carcinomaBoxplots of the dosimetric parameters for the HyperArc and RapidArc plans. a conformity index; b gradient radius; c high dose spillage; d intermediate dose spillage. Boxes, median value and upper and lower quartiles; Whiskers, maximum and minimum values within 1.5 interquartile range; Dots, outliersBack to article page