Table 1.
Compared to MV-identified positions, the root-mean-squared error (RMSE) is shown for QUASAR tumor positions identified in scatter images collected with variable frame integration times and plan types. The dynamic motion, 4 × 8 cm2 delivery field data RMSE are averaged over five trials, and the standard deviation is provided.
| Motion | Plan type | Integration time (ms) | MU / frame | RMSE (mm) |
|---|---|---|---|---|
| Stepwise | 4 x 8 cm2 | 5000 | 100 | 0.2 |
| Dynamic | 4 x 8 cm2 | 300 | 6 | 0.8 ± 0.08 |
| 4 x 8 cm2 | 600 | 12 | 0.6 ± 0.02 | |
| DCA | 250 | 5 | 1.4 | |
| DCA | 500 | 10 | 1.2 | |
| VMAT | 250 | 5 | 3.9 | |
| VMAT | 500 | 10 | 2.9 |