Figure 3.

Gamma function results for PDD values for: (a) $6\times 6\hspace{0.17em}{\text{cm}}^2$, (b) $10\times 10\hspace{0.17em}{\text{cm}}^2$, and (c) $18\times 18\hspace{0.17em}{\text{cm}}^2$ field size. DD and DTA criteria were set as to 3% and 3 mm in the gamma calculations, respectively.