Table 5.
Gamma analysis of 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 | Gamma (3%/3mm TH: 10%) | |||||
|---|---|---|---|---|---|---|
| Clinac-iX (6MV FB) | TB-STx (6MV FB) | TB-STx (6MV FFFB) | ||||
| AAA | AXB | AAA | AXB | AAA | AXB | |
| C shape (easier) | 98.1 | 93.9 | 98.1 | 95.1 | 98.6 | 93.2 |
| C shape (hard) | 98.5 | 96.6 | 98.7 | 96.4 | 99.2 | 95.3 |
| H and N | 99.1 | 93.5 | 99.9 | 98.3 | 99.5 | 94.4 |
| Multi-target | 97.7 | 94.1 | 96.6 | 95.4 | 94.6 | 93.5 |
| Prostate | 99.0 | 97.4 | 99.4 | 95.2 | 98.8 | 93.4 |
| Mean±SD | 98.5±0.6 | 95.1±1.8 | 98.5±1.3 | 96.1±1.3 | 98.1±2.0 | 94.0±0.9 |
TH: Threshold, FB: Filtered beam, FFF: Flattening filter free, AAA: Analytical anisotropic algorithm, AXB: Acuros XB, SD: Standard deviation