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Corresponding Author

Abd Elhamed, Mohamed

Document Type

Original Article

Abstract

Background: Cochlear implant is an electronic device that stimulates auditory spiral ganglion cells to give persons with hearing loss a sense of sound. 2 primary radiological research studies for cochlear implantation are high-resolution computed tomography (HRCT) & magnetic resonance imaging (MRI). Poor depiction of aerated or mineralized structures, is major disadvantage of using MRI before cochlear implantation. Furthermore, due to length of test, sedation is usually needed for MRI in young, studied cases. CT scans can be conducted much more quickly
Aim and objectives: The study's goal was to highlight role of preoperative imaging in assessment of sensorineural hearing loss in pediatric candidates for cochlear implantation.
Subjects and methods: This study included 20 studied cases with severe to profound sensorineural hearing loss who referred to Radio-diagnosis Department at Al-Azhar University hospitals for imaging evaluation before cochlear implantation. All patients were subjected to HRCT & MRI of temporal bones.
Results: In the present study, the vestibular aqueduct was normal in 17 patients bilaterally, enlarged in two patients (four temporal bones) and not visualized in one female patient (one temporal bone). Vascular abnormalities were diagnosed in five patients (25% of total patients, 10 temporal bones) and they included high jugular bulb and deep sigmoid sinus.
Conclusion: Imaging is indispensable to the preoperative evaluation of patients of cochlear implantation.

Keywords

Preoperative; Computed Tomography; Magnetic Resonance Imaging; Pediatric; Cochlear Implantation

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