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Figure 1a: Depth dose curves for 6MeV electron beam at 100 cm FSD, 108 cm FSD and 115 cm FSD for 6.5 × 9.0 cm2 field size Figure 1b: Depth dose curves for 20MeV electron beam at 100 cm FSD, 108 cm FSD and 115 cm FSD for 6.5 × 9.0 cm2 field size Figure 1c: Depth dose curves for 6MeV electron beam at 100 cm FSD, 108 cm FSD and 115 cm FSD for 11.5 × 15 cm2 field size Figure 1d: Depth dose curves for 20MeV electron beam at 100 cm FSD, 108 cm FSD and 115 cm FSD for 11.5 × 15 cm2 field size 
