Table 2.
Tumor excursion from RCCT and RC-CBCTs for the study population. Tumor excursion was measured as the difference in centroid position between the end inhalation and end exhalation phase images. (LR = left to right direction, AP = anterior-posterior direction, CC = cranio-caudal direction, CBCT = cone beam CT, RCCT = planning respiration-correlated CT, RC-CBCT = respiration-correlated cone beam CT).
| Tumor Excursion, RCCT | Tumor Excursion Range, RC-CBCTs | ||||||
|---|---|---|---|---|---|---|---|
| Subject | LR (cm) | AP (cm) | CC (cm) | Number of CBCTs | LR (cm) | AP (cm) | CC (cm) |
| 1 | 0.15 | 0.20 | 0.39 | 3 | 0.10–0.20 | 0.10–0.20 | 0.20–0.30 |
| 2 | 0.08 | 0.30 | 0.61 | 3 | 0.15–0.18 | 0.30–0.52 | 0.80–0.98 |
| 3 | 0.31 | 0.45 | 0.99 | 3 | 0.07–0.14 | 0.41–0.50 | 0.61–0.83 |
| 4 | 0.37 | 0.22 | 0.80 | 1 | 0.55–0.55 | 0.38–0.38 | 0.72–0.72 |
| 5 | 0.16 | 0.18 | 0.88 | 7 | 0.08–0.32 | 0.10–0.30 | 1.07–1.37 |
| 6 | 0.34 | 0.72 | 1.84 | 7 | 0.15–0.44 | 0.14–0.88 | 0.94–1.89 |
| 7 | 0.37 | 1.44 | 1.15 | 5 | 0.14–0.57 | 0.71–1.35 | 1.01–1.30 |
| 8 | 0.34 | 0.45 | 1.88 | 4 | 0.07–0.66 | 0.40–0.58 | 1.20–1.83 |
| Mean | 0.27 | 0.50 | 1.07 | ||||