Table 3.
Overlap of planning gross tumour volume (pGTV) and cone beam CT-based gross tumour volume acquired prior to fraction 1 (cbctGTV1) volume (cm3), percentage (%) of structure within other structure and dice similarity coefficient (DICE)
| Patient | pGTV and cbctGTV1 (cm3) | % pGTV within cbctGTV1 | % cbctGTV1 within pGTV | DICE |
|---|---|---|---|---|
| 1 | 3.9 | 50.2 | 42.6 | 0.46 |
| 2 | 1.9 | 69.7 | 61.8 | 0.65 |
| 3 | 229.9 | 86.1 | 95.0 | 0.90 |
| 4 | 6.9 | 89.6 | 61.9 | 0.73 |
| 5 | 19.2 | 88.7 | 66.7 | 0.76 |
| 6 | 113.4 | 97.5 | 89.5 | 0.93 |
| 7 | 5.2 | 85.3 | 86.5 | 0.86 |
| 8 | 88.9 | 92.4 | 63.8 | 0.76 |
| 9 | 57.9 | 98.9 | 72.7 | 0.84 |
| 10 | 175.9 | 95.6 | 68.7 | 0.80 |
| 11 | 16.1 | 95.0 | 80.6 | 0.87 |
| 12 | 3.3 | 46.2 | 47.4 | 0.47 |
| Mean | 60.2 | 82.9 | 69.8 | 0.75 |
| Standard deviation | 77.0 | 18.0 | 16.1 | 0.16 |