Background: Free-breathing expiration-gating (EG) is a non-invasive technique used to manage respiratory-induced tumor motion. This study explores the effectiveness of EG stereotactic body radiotherapy (SBRT) for lung tumors using 10MV FFF VMAT.
Methods And Materials: The study included 41 patients (50 targets) treated with EG lung SBRT between September 2019 and February 2023.
Background: High-energy transmission beams (TBs) are currently the main delivery method for proton pencil beam scanning ultrahigh dose-rate (UHDR) FLASH radiotherapy. TBs place the Bragg-peaks behind the target, outside the patient, making delivery practical and achievement of high dose-rates more likely. However, they lead to higher integral dose compared to conventional intensity-modulated proton therapy (IMPT), in which Bragg-peaks are placed within the tumor.
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