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Figure 7: Out-of-field dose Monte Carlo versus measurement: Y-axis is represented by a relative dose (%), and the X-axis is represented by the off-axis distance (cm). A logarithmic scale was used on the Y-axis to represent the entire range of values. Four energies (6 MV, 6 MV flattening filter free, 10 MV and 15 MV) represented in sections a, b, c and d respectively, and five field sizes represented by different styles of dotted and solid lines. Monte Carlo Simulation was performed using Geant 4 and PRIMO programs. Measurements were made using FC65G farmer-type chamber on water-equivalent phantoms

Figure 7: Out-of-field dose Monte Carlo versus measurement: Y-axis is represented by a relative dose (%), and the X-axis is represented by the off-axis distance (cm). A logarithmic scale was used on the Y-axis to represent the entire range of values. Four energies (6 MV, 6 MV flattening filter free, 10 MV and 15 MV) represented in sections a, b, c and d respectively, and five field sizes represented by different styles of dotted and solid lines. Monte Carlo Simulation was performed using Geant 4 and PRIMO programs. Measurements were made using FC65G farmer-type chamber on water-equivalent phantoms