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