Table 3 Observer variation for the various CTV elective to normal tissue interfaces and the two delineation phases.
From: Decreased 3D observer variation with matched CT-MRI, for target delineation in Nasopharynx cancer
Anatomical regions | Phase 1 | Phase 2 | ||
|---|---|---|---|---|
| Â | SD (mm) | Agreement (%) | SD (mm) | Agreement (%) |
All regions | 5.9 | 17 | 4.9 (p = 0.01) | 59 (p = 0.004) |
Dorsal - Bone | 4.4 | 47 | 4.2 (n.s.) | 75 (n.s.) |
Dorsal - Invas. | 5.1 | 9 | 4.5 (p = 0.02) | 43 (p = 0.01) |
Pterygoid | 5.6 | 27 | 4.4 (p = 0.03) | 58 (p = 0.02) |
Parapharyngeal | 5.7 | 15 | 4.9 (p = 0.04) | 53 (p = 0.01) |
Sphenoid | 6.1 | 9 | 5.7 (p = 0.03) | 51 (p = 0.04) |
Nasoph. - Lat. | 5.7 | 11 | 4.7 (n.s.) | 66 (p = 0.02) |
Nasoph. - Ant. | 6.5 | 10 | 5.1 (p = 0.02) | 70 (p = 0.01) |
Caudal side | 7.9 | 7 | 5.6 (p = 0.03) | 47 (p = 0.005) |