Conclusion
Compared to the SBRT‐dedicated TrueBeam, Halcyon VMAT plans provided similar plan quality and treatment delivery accuracy, yet potentially faster treatment via one‐step patient setup and verification with no patient collision issues. Rapid delivery of daily APBI on Fast‐Forward trial on Halcyon with door‐to‐door patient time < 10 min, could reduce intrafraction motion errors, and improve patient comfort and compliance. We have started treating APBI on Halcyon. Clinical follow‐up results are warranted. We recommend Halcyon users consider implementing the protocol to remote and underserved APBI patients in Halcyon‐only clinics.
