Dosimetric study of split-arc technique based on personalized collimator optimization in VMAT for multiple brain metastases.
PURPOSE To evaluate the multiple split-arc technique in mitigating the "island blocking effect (IBE)" during volumetric modulated arc therapy (VMAT) for multiple brain metastases (MBM) and identify the optimal clinical protocol. METHODS A retrospective analysis of 20 MBM patients (2-5 targets) was performed. Four VMA...