Dual Arc Volumetric-modulated Arc Radiotherapy (VMAT) of Nasopharyngeal Carcinomas: A Simultaneous Integrated Boost Treatment Plan Comparison with Intensity-modulated Radiotherapies and Single Arc VMAT

In NPC cases, SA2 gave superior results in terms of PTV coverage and OAR sparing compared with SA1 and approached the performance achieved by 18F IMRT, but without sacrificing the delivery efficiency.