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[Temporal bone CT and MRI in cochlear implant candidates]
Gülgün Demirpolat1, Recep Savaş, Seçil Totan
1Ege Universitesi Tip Fakültesi, Radyodiagnostik Anabilim Dali, Izmir.
Tanisal Ve Girisimsel Radyoloji : Tibbi Goruntuleme Ve Girisimsel Radyoloji Dernegi Yayin Organi
|December 10, 2003
Summary
High-resolution imaging, including computed tomography and magnetic resonance imaging, aids surgeons in planning cochlear implant surgeries. These techniques help identify potential complications and anatomical variations in patients with sensorineural hearing loss.
Area of Science:
- Radiology
- Otolaryngology
- Neurosurgery
Background:
- Sensorineural hearing loss can be treated with cochlear implantation.
- Pre-operative imaging is crucial for assessing cochlear implant candidates, evaluating hearing loss etiology, and identifying anatomical factors impacting surgery.
Purpose of the Study:
- To review literature and discuss imaging findings relevant to cochlear implant surgery planning.
- To identify imaging features that influence surgical approach and outcomes in cochlear implant candidates.
Main Methods:
- Retrospective analysis of 33 cochlear implant candidates.
- High-resolution computed tomography (HRCT) performed on all candidates.
- Magnetic resonance imaging (MRI) with specific sequences (T2-weighted fast spin echo, constructive interference in steady state) used in 23 patients.
Main Results:
- 16 patients had normal imaging findings.
- Abnormalities including labyrinthine ossification, temporal bone variations, congenital malformations, and sequelae of otitis/trauma were found in 13 patients.
- Cochlear implantation was performed in 5 patients, with operative details and outcomes recorded.
Conclusions:
- HRCT and MRI are valuable tools for pre-operative planning in cochlear implant candidates.
- Imaging helps surgeons anticipate operative difficulties and potential complications.
- Detailed imaging analysis improves surgical planning and predicts outcomes for cochlear implantation.