Table 2. Contour volumes and the percent change in the adapted volumes compared to the reference planning volumes.
GTV: gross tumor volume; PTV: planning target volume; PTV_OPT: planning target volume optimized (PTV – (Bronchus Small Airway +0.3 cm) – (Heart/Pericardium + 0.2 cm) – Trachea Large Bronchus); GTV_OPT: gross tumor volume optimized (PTV_OPT – 0.3 cm).
| Target | Planned Volume (cm3) | Session 1 | Session 2 | Session 3 | |||
| Structure volume (cm3) | % Change | Structure volume (cm3) | % Change | Structure volume (cm3) | % Change | ||
| GTV | 103.1 | 101.92 | -1% | 102.57 | -1% | 110.87 | 8% |
| PTV | 308.6 | 300.74 | -3% | 305.17 | -1% | 319.25 | 3% |
| PTV-GTV | 205.5 | 198.75 | -3% | 202.55 | -1% | 208.36 | 1% |
| GTV_OPT | 144.99 | 143.61 | -1% | 149.07 | 3% | 155.21 | 7% |
| PTV_OPT | 273.12 | 267.03 | -2% | 274.21 | 0% | 288.2 | 6% |
| Heart | 580.93 | 681.19 | 17% | 582.95 | 0% | 589.06 | 1% |
| Trachea large bronchus | 59.76 | 58.03 | -3% | 57.77 | -3% | 58.8 | -2% |
| Bronchus small airway | 31.56 | 32.26 | 2% | 30.67 | -3% | 30.56 | -3% |