Table 1.
Setup Error Characteristics: Assessment of Differences Between Planar kV and CBCT in 3 Dimensions (mm).
| Direction | M | Σ | σ |
|---|---|---|---|
| CBCT | |||
| LR | 1.06 | 0.80 | 2.88 |
| AP | −1.45 | −1.20 | 1.87 |
| SI | −0.28 | −0.20 | 2.30 |
| Planar kV | |||
| LR | 1.30 | 1.60 | 2.45 |
| AP | 1.74 | 2.00 | 2.61 |
| SI | −1.02 | 0.93 | 1.00 |
Abbreviations: AP, anteroposterior (posterior = negative, anterior = positive); LR, lateral (left = negative, right = positive); M, mean setup error; SI, superoinferior (inferior = negative, superior = positive); Σ, systematic setup error; σ, random setup error.