Table 1

The percentage passing rate of 3D gamma indices in the three phantoms for each subregion and field size; the criteria of dose difference and DTA were set to 3% and 2 mm, respectively

Field size (cm2)
PhantomSubregion2 × 25 × 510 × 10
WaterBuildup100.093.897.6
Penumbra100.0099.599.7
Inner100.0099.699.9
All99.999.299.7
Slab lungBuildup98.798.298.7
Penumbra97.495.793.7
Inner97.669.858.9
All97.580.268.9
Spherical tumorBuildup98.997.898.1
Penumbra98.096.093.6
Inner93.980.876.0
All96.186.781.2
Field size (cm2)
PhantomSubregion2 × 25 × 510 × 10
WaterBuildup100.093.897.6
Penumbra100.0099.599.7
Inner100.0099.699.9
All99.999.299.7
Slab lungBuildup98.798.298.7
Penumbra97.495.793.7
Inner97.669.858.9
All97.580.268.9
Spherical tumorBuildup98.997.898.1
Penumbra98.096.093.6
Inner93.980.876.0
All96.186.781.2
Table 1

The percentage passing rate of 3D gamma indices in the three phantoms for each subregion and field size; the criteria of dose difference and DTA were set to 3% and 2 mm, respectively

Field size (cm2)
PhantomSubregion2 × 25 × 510 × 10
WaterBuildup100.093.897.6
Penumbra100.0099.599.7
Inner100.0099.699.9
All99.999.299.7
Slab lungBuildup98.798.298.7
Penumbra97.495.793.7
Inner97.669.858.9
All97.580.268.9
Spherical tumorBuildup98.997.898.1
Penumbra98.096.093.6
Inner93.980.876.0
All96.186.781.2
Field size (cm2)
PhantomSubregion2 × 25 × 510 × 10
WaterBuildup100.093.897.6
Penumbra100.0099.599.7
Inner100.0099.699.9
All99.999.299.7
Slab lungBuildup98.798.298.7
Penumbra97.495.793.7
Inner97.669.858.9
All97.580.268.9
Spherical tumorBuildup98.997.898.1
Penumbra98.096.093.6
Inner93.980.876.0
All96.186.781.2
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