Figure 4.8 displays the GafChromic®EBT2 film of International Specialty Product was employed in this study also. The response of the film ranges between 1 cGy and 10 Gy. The size of the film is 8´10inches (20.3´25.4 cm2). This film was used as a reference detector for this study due to high spatial resolution and near tissue equivalence. The reference from www.gafchromic.com