Figure 2.

Percent depth dose values for 15 MV photon beam calculated by MC code versus measurement data $(\text{SSD}\hspace{0.17em}=\hspace{0.17em}100)$. The curves (a), (b) and (c) are corresponding to $6\hspace{0.17em}\times \hspace{0.17em}6,\hspace{0.17em}10\hspace{0.17em}\times \hspace{0.17em}10$, and $18\times 18\hspace{0.17em}{\text{cm}}^2$ field sizes, respectively. For more clarification, the data for $6\hspace{0.17em}\times \hspace{0.17em}6$ and $10\times 10\hspace{0.17em}{\text{cm}}^2$ field sizes are scaled 0.8 and 0.9, respectively.