Table 1.
FDG-avid node motion and nodal volumes measured with un-gated and 4D-PET techniques. Node motion is quantified by the distance between the volume center of mass in the end-exhale and end-inhale phase of 4D-PET.
| Patient | Node | Motion (mm) | V(NTV3D) (cc) | V(ITV4D) (cc) | V(ITV4D)/V(NTV3D) | ||
|---|---|---|---|---|---|---|---|
| AP | LR | SI | |||||
| 1 | 1 | 0.5 | 4.8 | 10 | 0.7 | 2.5 | 3.4 |
| 2 | 0.9 | 1.1 | 8.2 | 7.0 | 16.2 | 2.3 | |
| 2 | 1 | 8.6 | 1.5 | 17 | 2.0 | 5.1 | 2.5 |
| 2 | 2.4 | 1.1 | 20 | 0.4 | 2.2 | 5.8 | |
| 3 | 1 | 1.3 | 0.3 | 3.4 | 0.4 | 0.9 | 2.2 |
| 2 | 1.8 | 0.3 | 0.7 | 0.5 | 1.1 | 2.1 | |
| 4 | 1 | 0.2 | 1.5 | 3.9 | 2.2 | 2.2 | 1.0 |
| 2 | 2.5 | 0.0 | 4.6 | 0.9 | 1.3 | 1.5 | |
| 3 | 2.2 | 0.9 | 6.7 | 0.8 | 1.9 | 2.4 | |
| 5 | 1 | 0.7 | 1.3 | 16 | 2.54 | 4.8 | 1.9 |
| 2 | 2.1 | 2.4 | 9.8 | 36.78 | 58.0 | 1.6 | |