Fig. 1From: Dosimetric comparison between RapidArc and HyperArc techniques in salvage stereotactic body radiation therapy for recurrent nasopharyngeal carcinomaBeam arrangements and arc trajectories of HyperArc (a) and RapidArc (b). a One partial coplanar arc, 0 degrees; three noncoplanar arcs, 45, 90, and 315 degrees; b two coplanar arcsBack to article page