Figure 1

EBT3 film dosimetry of 2 × 2 cm and 4 × 4 cm fields at 26.2 cm source-to-skin-distance demonstrating flatness of the fields in the radial (A) and transverse (B) planes of a 20 MeV electron beam output from a clinical linear accelerator.
EBT3 film dosimetry of 2 × 2 cm and 4 × 4 cm fields at 26.2 cm source-to-skin-distance demonstrating flatness of the fields in the radial (A) and transverse (B) planes of a 20 MeV electron beam output from a clinical linear accelerator.