Dosimetric comparison of hybrid IMRT and different arc techniques VMAT after breast‐conserving surgery for left‐sided breast cancer

C-VMAT exhibits obvious advantages in target area uniformity, conformality, and protection of the heart and the affected lung. However, its significant dose impact on the right lung cannot be ignored and requires further attention. On the other hand, t-VMAT has a remarkable advantage in treatment time. This study offers valuable references for clinicians to select the most suitable radiotherapy technique according to patients' specific conditions, such as tumor location, size, and OAR anatomical structures, aiming to optimize treatment outcomes and minimize adverse effects.