Table 5.
Inter-modality positional GTV analysis
| Metric | Inter-Modality Variability (SD) | |||||
|---|---|---|---|---|---|---|
| CT-PET | MR-PET | CTMR-PET | CT-MR | CT-CTMR | MR-CTMR | |
| CI | 0.33 (0.09) | 0.36 (0.05) | 0.36 (0.07) | 0.35 (0.09) | 0.40 (0.08) | 0.74 (0.17) |
| MDC (mm) | 7.8 (3.1) | 6.9 (2.4) | 7.3 (2.87) | 7.1 (1.7) | 6.7 (1.6) | 4.1 (0.9) |
| CGD (mm) | 6.1 (3.2) | 4.7 (2.2) | 4.9 (3.64) | 5.9 (3.1) | 5.4 (2.7) | 1.8 (1.4) |
| DICE | 0.55 (0.11) | 0.61 (0.06) | 0.60 (0.08) | 0.57 (0.09) | 0.62 (0.09) | 0.87 (0.10) |
| Se. Idxa | 0.56 (0.15) | 0.58 (0.11) | 0.54 (0.13) | 0.63 (0.14) | 0.67 (0.14) | 0.91 (0.09) |
| Incl. Idxb | 0.64 (0.18) | 0.74 (0.11) | 0.77 (0.13) | 0.57 (0.14) | 0.63 (0.14) | 0.85 (0.13) |
aSe. Idx is expressed as a proportion of the first named GTV contained within the second ie. for CT-PET Se. Idx is the proportion of the CT-GTV within the PET-GTV
bIncl. Idx is expressed as a proportion of the second named GTV contained within the first ie. for CT-PET Incl. Idx is the proportion of the PET-GTV within the CT-GTV