Table 1

- The averaged dose difference and 2D evaluating GPRs percentages for various field sizes within PTV.

Field size (cm2)3x35x510x10
Scenariobcbcbc
Dose difference (%)PTVat sinusitis14.0317.007.908.278.058.50
after sinusitis-2.64-5.10-2.82-5.14-3.14-6.06
2D GPRs (%) 94.5094.5096.9096.9092.6092.50

PTV: planning target volume, GPRs: gamma passing rates