Table 3. .
Group mean, systematic and random errors
| X [mm] – LR | Y [mm] – AP | Z [mm] – CC | ||
|---|---|---|---|---|
| Uncertainty in T | M | 0.1 | −0.3 | 0.4 |
| Σ | 1.3 | 1.2 | 1.1 | |
| δ | 0.9 | 1 | 1 | |
| Uncertainty in N | M | 0.1 | −0.3 | 0.3 |
| Σ | 1 | 1.1 | 1.2 | |
| δ | 0.7 | 0.9 | 1 | |
| Uncertainty in C | M | 0.2 | −0.2 | 0.3 |
| Σ | 0.8 | 0.9 | 1.4 | |
| δ | 0.6 | 0.7 | 1.2 | |
| Differential motion: T vs N | M | 0.1 | −0.1 | 0.2 |
| Σ | 1.2 | 1 | 1.2 | |
| δ | 0.9 | 0.9 | 1 | |
| Differential motion: T vs C | M | 0 | −0.1 | 0 |
| Σ | 0.9 | 1 | 1.4 | |
| δ | 0.7 | 0.8 | 1.1 | |
| Differential motion: C vs N | M | 0.1 | 0.1 | 0 |
| Σ | 0.6 | 0.6 | 0.9 | |
| δ | 0.5 | 0.6 | 0.8 |
Σ, systematic error; δ, random error; AP, anterior–posterior; C, carina; CC, cranio–caudal; LR, left–right; M, group mean; N, lymph nodes; T, peripheral tumour.