TABLE 4.
Preoperative imaging findings for all implanted ears
| Image | CT (n = 244) | MRI (n = 376) |
| Cochlea (%): | ||
| Normal | 84.0 | 91.8 |
| Hypoplastic, full basal | 6.6 | 2.4 |
| Hypoplastic, <full basal | 1.2 | 0.8 |
| Common cavity | 0.4 | 0.3 |
| Dysplastic, full basal | 4.9 | 1.9 |
| Labyrinthitis ossificans | 0.8 | 2.4 |
| Other | 2.0 | 3.8 |
| Enlarged vestibular aqueduct (%) | 4.1 | 4.8 |
| Vestibule/Semicircular canal (%): | ||
| Normal | 88.5 | 88.2 |
| Dysplastic | 10.2 | 8.0 |
| Ossified/fibrotic | 0.8 | 3.7 |
| Other | 0.4 | 0.0 |
| Cochlear nerve deficiency (%) | – | 4.8 (n = 18) |
CT indicates computer tomography; MRI, magnetic resonance imaging.