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. Author manuscript; available in PMC: 2020 Nov 15.
Published in final edited form as: Phys Med Biol. 2019 Nov 15;64(22):225006. doi: 10.1088/1361-6560/ab4af4

Table 2.

Average Primary Transmission as a Function of Grid Offset

Grid Name Average Primary Transmission Fraction (Tp)
Ideal Position 5 mm Offset % Change after 5 mm Offset 10 mm Offset % Change after 10 mm Offset
1DGrid R21 69.9±0.4% 66.4% 5% 62.4% 10.7%
2DGrid R12P2 86.1±0.5% 84.3% 2.2% 81.3% 5.6%
2DGrid R12P3 89.1±0.4% 86.5% 2.9% 83% 6.8%
2DGrid R16P2 83.8±0.4% 80.8% 3.6% 76.9% 8.2%