Clinical Study
Value of MR and CT Imaging for Assessment of Internal Carotid Artery Encasement in Head and Neck Squamous Cell Carcinoma
Table 1
Radiologically determined criteria and interobserver kappa.
| Radiologically determined criteria | Observer 1
N = 12 | Observer 2
N = 12 | Interobserver kappa |
| Encasement | | | 0.584 | <180 degrees | 2 (17%) | 0 (0%) | | 180–270 degrees | 0 (0%) | 4 (33%) | | >270 degrees | 10 (83%) | 8 (67%) | | Obliteration of fat planes | | | 1 | No | 0 | 0 | | Yes
| 12 (100%) | 12 (100%) | | Deformation of the carotid artery | | | 0.273 | No | 4 (33%) | 2 (17%) | | Yes | 8 (67%) | 10 (83%) | | Length of contact carotid artery | | | 0.488
| Mean in cm | 3.5 (range: 1.0–5.0; SD 1.3) | 3.6 (range: 1.6–6.1; SD 1.6) | |
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