Table 2 Volumetric and length comparison of GTV, ITV and PTV structures; there were no statistically significant differences (Mann-Whitney Test) between the volumes/lengths when comparing structures from the 3D PET-CT to the 4D CT and structures from the 4D PET-CT to the 4D CT
Volume (cm3) | Length (cm) | |||||
|---|---|---|---|---|---|---|
GTV | ITV | PTV | GTV | ITV | PTV | |
4D CT | 108.1 | 271.8 | 528.4 | 5.4 | 10.0 | 10.9 |
3D PET-CT | 82.6 | 239.8 | 472.5 | 6.4 | 10.1 | 11.1 |
p-value | 0.89 | 0.95 | 0.95 | 0.52 | 0.8 | 0.7 |
4D PET-CT | 88.3 | 236.0 | 480.6 | 5.1 | 9.6 | 10.6 |
p-value | 0.85 | 0.57 | 0.75 | 0.95 | 0.7 | 0.85 |