Table 2.
Conformity index for the task group 119 test cases from the analytical anisotropic algorithm and Acuros XB algorithm-calculated RapidArc plans for the Clinac-iX (6 MV) and TB-STx (6MV_filtered beam and 6MV_flattening filter-free beam), respectively
| Structure | CI | |||||
|---|---|---|---|---|---|---|
| Clinac-iX (6MV FB) | TB-STx (6MV FB) | TB-STx (6MV FFFB) | ||||
| AAA | AXB | AAA | AXB | AAA | AXB | |
| C Shape (easier) | 1.037 | 0.970 | 1.035 | 0.953 | 1.033 | 0.785 |
| C Shape (hard) | 1.055 | 0.997 | 1.046 | 0.974 | 1.049 | 0.911 |
| H and N | 0.923 | 0.955 | 0.929 | 0.492 | 0.935 | 0.399 |
| Multi-target | 1.045 | 0.963 | 1.069 | 1.048 | 1.077 | 1.010 |
| Prostate | 0.989 | 0.943 | 0.977 | 0.923 | 0.971 | 0.851 |
| Mean±SD | 1.010±0.055 | 0.966±0.020 | 1.011±0.057 | 0.878±0.221 | 1.013±0.058 | 0.791±0.234 |
TB: TrueBeam, FB: Filtered beam, FFFB: Flattening filter-free beam, CI: Conformity index, AAA: Analytical anisotropic algorithm, AXB: Acuros XB, SD: Standard deviation