| Visualized in x-rays | Non-visualized in x-rays | ||||
|
| Non-detectable cases% |
| Non-detectable cases% | ||
| CT-scans | x-rays | CT-scans | x-rays | ||
| Atrophy-normal hypertrophy of inferior turbinate | 0.0 | 28.6 | Anterior ethmoidal artery | 25.0 | 100.0 |
| Atrophy-normal hypertrophy of middle turbinate | 3.6 | 50.0 | Atrophy-normal hypertrophy of superior turbinate | 21.4 | 100.0 |
| Hypoplasia/normal/hyperplasia of anterior ethmoidal sinus | 0.0 | 14.3 | Contact to middle turbinate of orbital lamina of ethmoidal bone | 0.0 | 100.0 |
| Hypoplasia/normal/hyperplasia of frontal sinus | 0.0 | 14.3 | Frontal recess | 0.0 | 100.0 |
| Hypoplasia/normal/hyperplasia of maxillary sinus | 0.0 | 14.3 | Infraorbital cell | 0.0 | 100.0 |
| Hypoplasia/normal/hyperplasia of posterior ethmoidal sinus | 0.0 | 14.3 | Keros classification | 0.0 | 100.0 |
| Hypoplasia/normal/hyperplasia of sphenoid sinus | 0.0 | 14.3 | Lund-Mackay ostiomeatal unit | 0.0 | 100.0 |
| Lund-Mackay anterior ethmoidal sinus | 0.0 | 0.0 | Mucosa of pneumatized middle turbinate | 0.0 | 100.0 |
| Lund-Mackay frontal sinus | 0.0 | 7.1 | Mucosa of pneumatized superior turbinate | 0.0 | 100.0 |
| Lund-Mackay maxillary sinus | 0.0 | 0.0 | OMC region, accessory maxillary sinus ostium | 7.1 | 100.0 |
| Lund-Mackay posterior ethmoidal sinus | 0.0 | 7.1 | OMC region, hiatus | 0.0 | 100.0 |
| Lund-Mackay sphenoid sinus | 0.0 | 3.6 | OMC region, infundibulum | 0.0 | 100.0 |
| Mucosa of nasal cavity (extent of edema) | 0.0 | 14.3 | OMC region, maxillary antrum | 0.0 | 100.0 |
| Mucosa of nasal cavity (normal-polypous) | 0.0 | 14.3 | OMC region, pneumatized superior attachment of uncinate process | 0.0 | 100.0 |
| Need for septoplasty1 | 0.0 | 35.7 | OMC region, prominent ethmoid bulla | 0.0 | 100.0 |
| Septal deviation obstructing middle meatus | 0.0 | 32.1 | OMC region, superior attachment of uncinate process | 7.1 | 100.0 |
| Septum, crest | 0.0 | 17.9 | Optic nerve | 0.0 | 100.0 |
| Septum deviation | 0.0 | 21.4 | Sphenoethmoidal recess | 3.6 | 100.0 |
| Septum turbinate | 0.0 | 32.1 | Paradoxical middle turbinate | 0.0 | 100.0 |
| Septum, spur | 0.0 | 21.4 | Paradoxical superior turbinate | 7.1 | 100.0 |
| Sinus mucosal abnormalities of anterior ethmoidal sinus | 0.0 | 7.1 | Pneumatized middle turbinate | 0.0 | 100.0 |
| Sinus mucosal abnormalities of frontal sinus | 0.0 | 17.9 | Pneumatized superior turbinate | 7.1 | 100.0 |
| Sinus mucosal abnormalities of maxillary sinus | 0.0 | 3.6 | Previous sinus surgery performed | 0.0 | 100.0 |
| Sinus mucosal abnormalities of posterior ethmoidal sinus | 0.0 | 7.1 | Thickness of orbital lamina of ethmoidal bone | 0.0 | 100.0 |
| Sinus mucosal abnormalities of sphenoid sinus | 0.0 | 10.7 |
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