Figure 7.

Relative surface dose measured with GAFCHROMIC EBT2 film and MOSkin detector as the function of beam incident angle and normalized to 1 at 0° beam incident angle with $10\hspace{0.17em}\times \hspace{0.17em}10\hspace{0.17em}{\text{cm}}^2$ field size. The error bar represents 1 SD of three sets of measurements. The average standard deviation of three sets of measurements for MOSkin detector and GAFCHROMIC EBT2 film is 0.033 and 0.036, respectively.