Fig. 5
Radial dose distributions at the surface (dashed lines) and at dmax (solid lines) for the IORT applicator (red lines) and Cerrobend block (black lines) conditions. Field sizes of (a) 25 mm, (c) 38 mm, and (e) 51 mm for the 4 MeV electron beams, and (b) 25 mm, (d) 38 mm, and (f) 51 mm for the 6 MeV electron beams. The IORT applicator demonstrates reduced out-of-field dose compared to the Cerrobend block. For example, at the surface, the dose at 5 mm beyond the field edge is less than 3% for the IORT applicator (indicated by the red arrow), while the Cerrobend block requires an additional 5 mm distance to achieve the same dose level (indicated by the black arrow).
