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Table 2 The 1-D systematic study results of the gamma method and the IOA for the global 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   100.0 100.0 100.0   100.0 100.0 100.0
3%/3 mm 100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0
rate (%) 2%/2 mm 100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0   56.9 32.1 90.8
1%/1 mm 100.0 100.0 100.0   100.0 100.0 100.0   0 30.5 0   0 30.5 0
IOA Value 1.000 1.000 1.000   1.010 1.010 1.010   1.020 1.020 1.020   1.030 1.030 1.030
Rank 1 1 1   2 2 2   5 3 5   9 6 7
1 mm Gamma pass 4%/4 mm 100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0
3%/3 mm 100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0   99.5 99.2 99.2
rate (%) 2%/2 mm 100.0 100.0 100.0   100.0 100.0 100.0   71.6 99.2 54.2   28.9 32.1 45.8
1%/1 mm 100.0 100.0 100.0   71.6 84.7 54.2   28.4 16.0 45.8   28.0 16.0 45.0
IOA Value 1.013 1.028 1.016   1.016 1.029 1.019   1.024 1.034 1.026   1.033 1.041 1.034
Rank 3 4 3   4 5 4   6 7 6   11 8 10
2 mm Gamma pass 4%/4 mm 100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0
3%/3 mm 100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0   71.1 98.5 54.2
rate (%) 2%/2 mm 100.0 100.0 100.0   71.6 84.7 55.0   71.1 84.0 54.2   29.4 17.6 46.6
1%/1 mm 43.1 69.5 9.2   43.1 68.7 9.2   28.9 1.5 45.8   28.4 1.5 45.0
IOA Value 1.025 1.055 1.032   1.027 1.056 1.033   1.032 1.058 1.038   1.039 1.062 1.044
Rank 7 9 8   8 10 9   10 11 11   14 12 12
3 mm Gamma pass 4%/4 mm 100.0 100.0 100.0   100.0 100.0 100.0   100.0 100.0 100.0   71.6 99.2 55.7
3%/3 mm 100.0 100.0 100.0   72.0 84.7 55.7   71.6 84.7 55.7   70.6 83.2 54.2
rate (%) 2%/2 mm 44.1 69.5 10.7   43.1 68.7 9.9   70.6 67.7 53.4   29.9 3.8 46.6
1%/1 mm 42.2 67.9 9.2   42.2 67.2 8.4   1.4 1.5 1.5   1.4 1.5 1.5
IOA Value 1.037 1.081 1.047   1.039 1.082 1.048   1.042 1.084 1.051   1.048 1.086 1.056
Rank 12 13 13   13 14 14   15 15 15   16 16 16