Table 2.
Root-Mean-Square of geometric tracking errors (unit: mm) for MLC and couch tracking with sinusoidal motion traces and patient traces. All sinusoidal motion traces have the same peak-to-peak amplitude of 1.5 cm.
| Motion Trace | No Tracking | Couch Tracking | MLC Tracking | |||||
|---|---|---|---|---|---|---|---|---|
| Longitudinal | Lateral | Vertical | Longitudinal | Lateral | Vertical | Parallel to Leaf Travel | Perpendicular to Leaf Travel | |
| Sine 1 (Ts = 3 s) | 5.3 | 5.3 | 5.3 | 1.0 | 1.3 | 1.6 | 0.8 | 3.2 |
| Sine 2 (Ts = 4 s) | 5.3 | 5.3 | 5.3 | 0.6 | 0.9 | 0.8 | 0.5 | 2.3 |
| Sine 3 (Ts = 5 s) | 5.3 | 5.3 | 5.3 | 0.4 | 0.6 | 0.5 | 0.4 | 1.8 |
| Sine 4 (Ts = 6 s) | 5.3 | 5.3 | 5.3 | 0.4 | 0.7 | 0.5 | 0.2 | 1.6 |
| Sine 5 (Ts = 7 s) | 5.3 | 5.3 | 5.3 | 0.3 | 0.7 | 0.4 | 0.2 | 1.6 |
| Sine 6 (Ts = 8 s) | 5.3 | 5.3 | 5.3 | 0.3 | 0.6 | 0.3 | 0.2 | 1.5 |
| Patient trace 1 | 4.0 | 1.2 | 1.4 | 1.0 | 0.7 | 0.7 | 0.7 | 1.2 |
| Patient trace 2 | 6.3 | 0.9 | 2.1 | 0.8 | 0.7 | 0.7 | 0.6 | 0.9 |