Fig. 2

Radiation treatment plan and representative daily cone beam CT (CBCT). The plan summation for the dose distribution of case 3 showing coverage of the posterior scalp with a dose of 60 Gy with a sequential boost of 6 Gy to the surgical bed, with margin (left upper panel). The max point dose is 105.5% of the prescription dose. The upper right panel shows a representative image of the daily CBCT overlaid with the simulation CT, demonstrating consistent daily set up with minimal air gaps between the 3D-printed integrated headrest/bolus and the posterior scalp. The bottom left panel shows the dose distribution in sagittal view and the representative daily CBCT imaging on the bottom right panel in the sagittal view