TABLE 2.
The mean (± 1 standard deviation (SD)) difference between synthetic computed tomography (CT) and deformed CT‐based patient positioning, as well as synthetic digital reconstructed radiograph (DRR) and deformed DRR, in all directions
| Translation (mm) | Rotation (°) | ||||
|---|---|---|---|---|---|
| Registration | Direction | mean (± 1SD) | (minimum, maximum) | mean (±1SD) | (minimum, maximum) |
| 3D evaluation using Cone Beam CT | Right‐left/pitch | 0.1 ± 0.5 | (−1.0, 1.0) | 0.3 ± 0.5 | (−0.2, 1.3) |
| Posterior‐anterior/yaw | 0.4 ± 0.7 | (−0.7, 1.9) | 0.0 ± 0.3 | (−0.5, 0.7) | |
| Inferior‐superior/roll | −0.7 ± 0.6 | (−2.1, 0.3) | 0.0 ± 0.4 | (−0.9, 0.7) | |
| 2D evaluation using orthogonal projections | Right‐left/pitch | −0.0 ± 0.7 | (−2.5, 1.5) | 0.1 ± 0.6 | (−1.5, 1.8) |
| Posterior‐anterior/yaw | −0.2 ± 0.7 | (−2.5, 1.1) | −0.1 ± 0.5 | (−1.3, 1.2) | |
| Inferior‐superior/roll | −0.3 ± 0.8 | (−2.5, 1.3) | NaN | (NaN, NaN) | |