From: To propose adding index of achievement (IOA) to IMRT QA process
 | Intentional Dose Error | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
−3% | −2% | −1% | 0 | + 1% | + 2% | + 3% | ||||
Intentional Spatial Error | -3Â mm | Gamma pass rate (%) | 4%/4Â mm | 92.7 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 92.6 |
3%/3Â mm | 69.9 | 81.5 | 88.6 | 100.0 | 89.2 | 82.6 | 69.5 | |||
2%/2Â mm | 45.7 | 55.4 | 63.5 | 66.1 | 62.7 | 53.0 | 43.5 | |||
1%/1Â mm | 13.3 | 17.4 | 22.2 | 23.3 | 20.2 | 15.9 | 12.1 | |||
IOA | 1.060 | 1.056 | 1.052 | 1.051 | 1.052 | 1.055 | 1.059 | |||
IOH | 1.022 | 1.025 | 1.029 | 1.034 | 1.039 | 1.045 | 1.052 | |||
IOC | 0.936 | 0.942 | 0.948 | 0.953 | 0.958 | 0.962 | 0.966 | |||
-2Â mm | Gamma pass rate (%) | 4%/4Â mm | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | |
3%/3Â mm | 79.4 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 76.9 | |||
2%/2Â mm | 47.6 | 65.4 | 79.4 | 100.0 | 78.8 | 62.6 | 46.9 | |||
1%/1Â mm | 11.8 | 17.5 | 29.0 | 35.1 | 27.1 | 17.0 | 11.4 | |||
IOA | 1.049 | 1.043 | 1.039 | 1.038 | 1.039 | 1.042 | 1.048 | |||
IOH | 1.014 | 1.017 | 1.020 | 1.024 | 1.030 | 1.036 | 1.044 | |||
IOC | 0.948 | 0.955 | 0.961 | 0.966 | 0.971 | 0.975 | 0.978 | |||
-1Â mm | Gamma pass rate (%) | 4%/4Â mm | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | |
3%/3Â mm | 94.6 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 92.9 | |||
2%/2Â mm | 47.6 | 81.4 | 100.0 | 100.0 | 100.0 | 79.1 | 47.0 | |||
1%/1Â mm | 8.2 | 16.1 | 40.7 | 100.0 | 37.2 | 16.0 | 7.4 | |||
IOA | 1.036 | 1.029 | 1.023 | 1.020 | 1.022 | 1.028 | 1.036 | |||
IOH | 1.005 | 1.007 | 1.009 | 1.013 | 1.019 | 1.026 | 1.035 | |||
IOC | 0.962 | 0.970 | 0.976 | 0.982 | 0.986 | 0.989 | 0.992 | |||
0 | Gamma pass rate (%) | 4%/4Â mm | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | |
3%/3Â mm | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | |||
2%/2Â mm | 55.3 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 55.8 | |||
1%/1Â mm | 0 | 0.1 | 100.0 | 100.0 | 100.0 | 0.1 | 0 | |||
IOA | 1.030 | 1.020 | 1.010 | 1.000 | 1.010 | 1.020 | 1.030 | |||
IOH | 1.000 | 1.000 | 1.000 | 1.000 | 1.010 | 1.020 | 1.030 | |||
IOC | 0.970 | 0.980 | 0.990 | 1.000 | 1.000 | 1.000 | 1.000 | |||
+ 1 mm | Gamma pass rate (%) | 4%/4 mm | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | |
3%/3Â mm | 92.8 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 95.0 | |||
2%/2Â mm | 45.7 | 78.4 | 100.0 | 100.0 | 100.0 | 82.2 | 48.5 | |||
1%/1Â mm | 7.1 | 15.4 | 36.5 | 100.0 | 41.3 | 16.6 | 8.4 | |||
IOA | 1.036 | 1.029 | 1.023 | 1.020 | 1.023 | 1.028 | 1.036 | |||
IOH | 1.005 | 1.007 | 1.010 | 1.014 | 1.019 | 1.027 | 1.035 | |||
IOC | 0.962 | 0.971 | 0.978 | 0.984 | 0.989 | 0.992 | 0.995 | |||
+ 2 mm | Gamma pass rate (%) | 4%/4 mm | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | |
3%/3Â mm | 75.6 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 81.6 | |||
2%/2Â mm | 44.3 | 60.7 | 78.5 | 100.0 | 79.9 | 67.0 | 49.9 | |||
1%/1Â mm | 10.6 | 16.3 | 26.3 | 35.1 | 29.8 | 18.2 | 12.5 | |||
IOA | 1.049 | 1.043 | 1.039 | 1.038 | 1.039 | 1.042 | 1.048 | |||
IOH | 1.015 | 1.018 | 1.022 | 1.026 | 1.031 | 1.037 | 1.045 | |||
IOC | 0.950 | 0.958 | 0.964 | 0.970 | 0.976 | 0.980 | 0.984 | |||
+ 3 mm | Gamma pass rate (%) | 4%/4 mm | 91.5 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 94.3 | |
3%/3Â mm | 66.4 | 80.1 | 88.1 | 100.0 | 89.9 | 84.4 | 74.1 | |||
2%/2Â mm | 41.4 | 51.1 | 61.7 | 66.0 | 64.6 | 57.6 | 47.9 | |||
1%/1Â mm | 11.1 | 14.9 | 19.5 | 23.3 | 23.0 | 18.2 | 14.1 | |||
IOA | 1.060 | 1.056 | 1.053 | 1.051 | 1.052 | 1.055 | 1.059 | |||
IOH | 1.024 | 1.028 | 1.032 | 1.036 | 1.041 | 1.047 | 1.054 | |||
IOC | 0.940 | 0.947 | 0.954 | 0.960 | 0.966 | 0.970 | 0.975 |