Table 2.
Amplitude of tumour (or surrogate) motion in three directions, as well as total Euclidian Distance for 4D-CT and 4D-MRI. Difference in amplitude also shown, with “+” demonstrating greater movement on 4D-CT and “-“ demonstrating greater movement on 4D-MRI.
| Pt # | Centroid of Tumour (or ROI) movement (mm) |
Total Euclidian Distance (mm) |
Diff (mm) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 4D-CT |
4D-MRI |
||||||||
| ΔX | ΔY | ΔZ | ΔX | ΔY | ΔZ | 4D-CT | 4D-MRI | ||
| 1 | 3.6 | 4.5 | 11.5 | 4.7 | 1.3 | 8.6 | 12.9 | 9.9 | +3.0 |
| 2 | 3.6 | 3.9 | 19.6 | 5.3 | 5.9 | 19.1 | 20.3 | 20.7 | -0.4 |
| 3 | 2.0 | 1.7 | 1.0 | 3.1 | 0.7 | 2.8 | 2.8 | 4.2 | -1.4 |
| 4 | 6.1 | 4.9 | 24.3 | 0.4 | 0.6 | 20.3 | 25.5 | 20.3 | +5.2 |
| 5 | 4.7 | 4.4 | 7.0 | 1.4 | 0.6 | 10.1 | 9.5 | 10.2 | -0.7 |
| 6 | 0.2 | 1.2 | 3.5 | 0.1 | 0.0 | 0.7 | 3.7 | 0.7 | +3.0 |
| 7 | 2.5 | 2.4 | 3.8 | 1.9 | 1.7 | 8.0 | 5.1 | 8.4 | -3.3 |
| 8 | 3.1 | 6.3 | 12.6 | 2.9 | 9.0 | 15.1 | 14.4 | 17.8 | -3.4 |
| 9 | 1.3 | 5.4 | 6.2 | 1.8 | 1.9 | 6.3 | 8.3 | 6.8 | +1.5 |
| 10 | 0.1 | 9.1 | 11.0 | 2.1 | 6.0 | 15.5 | 14.3 | 16.8 | -2.5 |
| Median | 2.8 | 4.5 | 9.0 | 2.0 | 1.5 | 9.4 | 11.2 | 10.1 | -0.6 |