Table 2 Observer variation for the various CTV 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 | 4.4 | 36 | 3.3 (p = 0.02) | 64 (p = 0.003) |
Anterior - Air | 3.4 | 62 | 2.7 (p = 0.01) | 79 (p = 0.02) |
Dorsal - Bone | 3.6 | 49 | 2.7 (p = 0.005) | 84 (p = 0.005) |
Contra lateral | 4.2 | 16 | 3.5 (p = 0.05) | 66 (p = 0.004) |
Pterygoid M. | 4.3 | 35 | 3.1 (p = 0.02) | 61 (p = 0.03) |
Parapharyngeal | 4.4 | 31 | 3.3 (p = 0.007) | 59 (p = 0.005) |
Soft Palate | 4.7 | 37 | 3.0 (p = 0.005) | 67 (p = 0.01) |
Sphenoid | 5.0 | 28 | 4.2 (p = 0.03) | 48 (p = 0.01) |
Caudal side | 7.7 | 5 | 3.3 (p = 0.001) | 56 (p < 0.001) |