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In (a), the Monte Carlo simulation results for the PDD curves of the dose and light emission for the AP-PA geometry, normalized at isocenter for thicknesses of 50, 100, 150, 200, 250, 300, 350, and 400 mm are plotted. In (b), the x-ray fluence spectra at depths of 0, 10, 20, 30, 40, and 50 are plotted for the 100 mm thickness phantom. Both plots are for a 10 × 10 cm 6 MV beam.
