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Table 3 The 1-D systematic study results of the gamma method and the IOA for the local normalization

From: To propose adding index of achievement (IOA) to IMRT QA process

  Intentional Dose
Error =>
0%   + 1%   + 2%   + 3%
Intentional Spatial Error Model => A B C   A B C   A B C   A B C
0 mm Gamma pass 4%/4 mm 100.0 100.0 100.0   100.0 100.0 100.0   99.0 100.0 98.3   99.0 100.0 98.3
3%/3 mm 100.0 100.0 100.0   100.0 100.0 100.0   99.0 100.0 98.3   99.0 100.0 98.3
rate (%) 2%/2 mm 100.0 100.0 100.0   100.0 100.0 100.0   99.0 100.0 98.3   59.3 35.3 98.3
1%/1 mm 100.0 100.0 100.0   100.0 100.0 100.0   0 33.6 0   0 33.6 0
IOA Value 1.000 1.000 1.000   1.077 1.034 1.099   1.154 1.068 1.199   1.231 1.101 1.298
Rank 1 1 1   2 2 2   5 3 5   8 4 8
1 mm Gamma pass 4%/4 mm 100.0 100.0 100.0   100.0 100.0 100.0   99.0 100.0 98.3   99.0 100.0 98.3
3%/3 mm 100.0 100.0 100.0   100.0 100.0 100.0   99.0 100.0 98.3   99.0 100.0 98.3
rate (%) 2%/2 mm 100.0 100.0 100.0   100.0 100.0 100.0   69.8 100.0 49.6   30.2 35.3 49.6
1%/1 mm 100.0 100.0 100.0   70.4 84.0 50.4   29.6 17.6 49.6   29.6 17.6 49.6
IOA Value 1.128 1.164 1.165   1.149 1.167 1.193   1.200 1.177 1.258   1.264 1.192 1.341
Rank 3 5 3   4 6 4   6 7 6   10 8 10
2 mm Gamma pass 4%/4 mm 100.0 100.0 100.0   100.0 100.0 100.0   99.0 100.0 98.3   99.0 100.0 98.3
3%/3 mm 100.0 100.0 100.0   100.0 100.0 100.0   72.9 100.0 54.6   69.8 100.0 50.4
rate (%) 2%/2 mm 100.0 100.0 100.0   70.4 84.0 51.3   69.8 84.0 50.4   30.7 19.3 50.4
1%/1 mm 40.2 67.2 0.8   40.2 67.2 0.8   30.2 1.7 49.6   30.2 1.7 49.6
IOA Value 1.225 1.286 1.290   1.250 1.294 1.323   1.294 1.305 1.379   1.349 1.320 1.451
Rank 7 9 7   9 10 9   11 11 11   14 12 14
3 mm Gamma pass 4%/4 mm 100.0 100.0 100.0   100.0 100.0 100.0   77.4 100.0 62.2   69.8 100.0 51.3
3%/3 mm 100.0 100.0 100.0   70.9 84.0 52.1   69.8 84.0 51.3   69.8 84.0 51.3
rate (%) 2%/2 mm 40.7 67.2 1.7   40.2 67.2 1.7   69.8 67.2 50.4   31.2 3.4 50.4
1%/1 mm 39.7 66.4 1.7   39.7 66.4 0.8   1.0 1.7 0.8   1.0 1.7 0.8
IOA Value 1.318 1.404 1.411   1.347 1.415 1.448   1.389 1.428 1.503   1.441 1.443 1.570
Rank 12 13 12   13 14 13   15 15 15   16 16 16