Table 6.
Gamma analysis and point dose results of IMRT and VMAT plans of AAPM TG 119 test cases. Gamma criteria of 3% dose difference (DD) and 3 mm distance to agreement (DTA).
| VMAT | IMRT | |||||||
|---|---|---|---|---|---|---|---|---|
| Point Dose (Gy) | Gamma | Point Dose (Gy) | Gamma <1(%) | |||||
| Test Case | Measured | Planned | ratio | <1(%) | Measured | Planned | ratio | <1(%) |
| Prostate | 1.989 | 2.066 | 0.98 | 96.79 | 2.0 | 2.0072 | 0.996 | 97.67 |
| Head & Neck | 1.915 | 1.943 | 1.014 | 98.15 | 1.960 | 1.984 | 0.988 | 95.92 |
| C‐shaped | 2.263 | 2.292 | 0.987 | 96.86 | 2.301 | 2.325 | 0.987 | 96.11 |
| Multi Target | 2.301 | 2.280 | 1.009 | 98.99 | 2.245 | 2.288 | 0.981 | 97.92 |