Table 1 Motion of intra-thoracic structures in patient1 (i) during audio-coached 4DCT scan, (ii) in the gating phases of 4DCT scan, and (iii) TI-EPI during phase end-inspiration RGRT.
Patient 1 | 4DCT (all phases) | 4DCT gated (three phases) | ||||
|---|---|---|---|---|---|---|
| Â | X (Max motion) | Y (Max motion) | X (1 SD motion) | Y (1 SD motion) | X (Max motion) | Y (Max motion) |
Carina (bifurcation) | 2.8 mm | 10.0 mm | 1.2 mm | 3.8 mm | 1.8 mm | 2.5 mm |
Proximal bronchus (bifurcation) | 3.7 mm | 17.5 mm | 1.3 mm | 5.7 mm | 1.9 mm | 5.0 mm |
End-inspiration gating (26 treatments) | Gating reproducibility (excluding patient set-up errors) | Â | Â | |||
| Â | X (Mean error) | Y (Mean error) | X (1 SD motion) | Y (1 SD motion) | Â | Â |
Bronchial tree | 0.7 mm to lateral | 2.8 mm to cranial | 0.7 mm | 1.6 mm | Â | Â |