Table 2.
Dose discrepancy, calculated by subtracting full 4D summation dose from the AVG-CT dose, in cGy. The percentage was calculated by dividing the dose difference by the 4D summation dose and converting to a percentage for each numerical motion phantom. GTV D99 and D1 represent the dose to 99% and 1% of the GTV, while MLD stands for mean lung dose.
| S-I Amplitude (cm) | Dose discrepancy (cGy) | ||||
|---|---|---|---|---|---|
| GTVMin | GTVMean | GTV D99 | GTV D1 | MLD | |
| 2 | 0.27 | 0.35 | 0.80 | 0.45 | 0.25 |
| (0.30%) | (0.37%) | (0.88%) | (0.47%) | (0.25%) | |
| 3 | 0.56 | 0.55 | 0.70 | 0.70 | 0.39 |
| (0.63%) | (0.58%) | (0.77%) | (0.73%) | (1.01%) | |
| 4 | 1.74 | 0.29 | 1.20 | 0.60 | 0.39 |
| (1.99%) | (0.31%) | (1.34%) | (0.63%) | (1.01%) | |
| 2.7 cm diaphragm-tumor distance | 0.81 | 0.03 | 0.75 | 0.10 | 0.22 |
| (0.89%) | (0.03%) | (0.82%) | (0.10%) | (0.58%) | |
| 4.7 cm diaphragm-tumor distance | 0.19 | 0.21 | 0.40 | 0.45 | 0.63 |
| (0.22%) | (0.23%) | (0.44%) | (0.47%) | (1.61%) | |