Table 5.
PTV margins calculated from interfraction and intrafraction errors of this study and other investigators using margin formula: 2.5Σ + 0.7σ.
| Margin | |||||
|---|---|---|---|---|---|
| Study (First Author) | Method | Time(min) | LR (mm) | SI (mm) | AP (mm) |
| Inter-fraction Setup Error Only (after skin mark setup) |
|||||
| Van den Heuvel et al. | EPID | 13 | 12.5 | 11.6 | |
| O'Daniel et al. | kV CT | 5.8 | 9.9 | 12.3 | |
| Litzenberg et al. | Calypso | 8 | 10 | 7.3 | |
| This Study | Calypso | 8.3 | 10.5 | 14.2 | |
| Intra-fraction Organ Motion Error Only (after online correction using markers) |
|||||
| Nederveen et al. | EPID Cine Images | ~2–3 | 0.24 | 2 | 1 |
| Kitamura et al. | kV Fluoro | ~2 | 0.2 | 1.2 | 0.6 |
| Aubry et al. | EPID pre & Post Tx | 1.1 | 1.7 | 2.7 | |
| McNair et al. | EPID pre & Post Tx | 3.1 | 3.4 | 3.6 | |
| Schallenkamp et al. | EPID inter-beam | 3.4 | 2.2 | 3.1 | |
| Litzenberg et al. | Calypso | ~8 | 1.8 | 7.1 | 5.8 |
| Litzenberg et al. | Calypso (every 2 mins) | ~8 | 1.4 | 1.8 | 2.3 |
| This Study | Calypso | ~8 | 1.3 | 2.3 | 2.8 |
| This Study | Calypso (every 2 mins) | ~8 | 0.5 | 1 | 1.5 |