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Figure 3: Screen shots for cases (1 and 5) views for Grid techniques, these cases had many critical structures were in the district of the tumor, which lead to great different in EUD (Gy) when compare between conformal and Grid plans Case 1 (Paranasal sinus) and case 5 (oral cavity), EUD (Gy): Equivalent uniform dose (Gy)

Figure 3: Screen shots for cases (1 and 5) views for Grid techniques, these cases had many critical structures were in the district of the tumor, which lead to great different in EUD (Gy) when compare between conformal and Grid plans Case 1 (Paranasal sinus) and case 5 (oral cavity), EUD (Gy): Equivalent uniform dose (Gy)