Objective: To compare the dosimetric differences between volumetric modulated arc therapy and intensity modulated radiotherapy for breast cancer patients after breast-conserving surgery. Methods:Ten patients who received radiotherapy after breast-conserving surgery were selected. Eclipse planning system was used to design volumetric rotating intensity-modulated( 2 F-Rapid Arc) and two field intensitymodulated radiation therapy( 2 F-IMRT) planning for each patient. 2 F-Rapid Arc plans were made using two par...