Table 9. Comparisons of calculated margins for planning target volumes with those of previous studies considering inter-fractional variations.
| Author | Image guide method | Margin recipe | Calculated margin (mm) | ||
|---|---|---|---|---|---|
| RL | SI | AP | |||
| Dionisi et al. [19] | CBCT | 2.5∑ + 0.7σ | 3.48 | 4.08 | 4.33 |
| Dzierma et al. [20] | CBCT | 2∑ + 0.7σ | 3.3 | 3.3 | 3.5 |
| 2.5∑ + 0.7σ | 3.8 | 3.8 | 4.0 | ||
| Gupta et al. [21] | EPID | 2∑ + 0.7σ | 3.34 | 4.14 | 3.28 |
| 2.5∑ + 0.7σ | 3.76 | 4.74 | 3.76 | ||
| This study | ExacTrac | 2∑ + 0.7σ | 2.87 | 3.66 | 3.99 |
| 2.5∑ + 0.7σ | 3.50 | 4.41 | 4.88 | ||
Abbreviation: RL, right-left; SI, superior-inferior; AP, anterior-posterior; CBCT, cone beam computed tomography; EPID, electronic portal imaging device