Accuracy and workflow efficiency of surface-guided open-face vs. closed-face masks in SRT/SRS for brain metastases

OFM combined with SGRT provides improved rotational stability and comparable translational setup accuracy overall compared with CFMs in SRT/SRS, despite inferior longitudinal (y-axis) accuracy. OFM/SGRT was associated with fewer setup-related deviations during initial positioning. While overall session durations were comparable between workflows, reduced setup-related interruptions were observed with OFM/SGRT. These findings support OFM/SGRT as a clinically viable and patient-friendly alternative to conventional CFMs in SRT/SRS.