Comparison of residual geometric errors obtained for lung SBRT under static beams and VMAT techniques: Implications for PTV margins

- VMAT reduces time spent on bed for Lung SBRT patients compared to static beams.
- The average residual positional errors are less for patients treated with VMAT.
- Introducing VMAT for lung SBRT could reduce setup margins from 5 mm to 3 mm.
- However, we recommend maintaining a 5 mm margin to further reduce time on bed.