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Preoperative high resolution CT and MR imaging in cochlear implantation
A Abdullah1, M R Mahmud, A Maimunah
1Department of Otorhinolaryngology, Faculty of Allied Health Sciences, University Kebangsaan Malaysia.
Annals of the Academy of Medicine, Singapore
|September 13, 2003
Summary
Preoperative imaging using high-resolution computed tomography (HRCT) and magnetic resonance (MR) is crucial for cochlear implant surgery. Most patients had normal temporal bone findings, but abnormalities like labyrinthitis ossificans were also identified.
Area of Science:
- Radiology
- Otolaryngology
- Neurosurgery
Background:
- Preoperative imaging of the temporal bone is essential for cochlear implant candidates.
- High-resolution computed tomography (HRCT) and magnetic resonance (MR) imaging are key modalities.
- These imaging techniques assess otic capsule, mastoid pneumatization, middle ear, cochlear ducts, and cochlear nerve.
Purpose of the Study:
- To evaluate the utility of HRCT and MR imaging in preoperative assessment for cochlear implantation.
- To identify common temporal bone abnormalities in patients undergoing cochlear implantation.
Main Methods:
- Retrospective review of HRCT and MR imaging in 46 cochlear implant patients.
- Analysis of imaging findings related to temporal bone anatomy and pathology.
Main Results:
- 73.9% of patients showed normal HRCT of the temporal bone.
- Identified abnormalities included labyrinthitis ossificans (10.9%), Mondini's abnormality (4.3%), and middle ear effusion (4.3%).
- Other findings included high jugular bulb, internal auditory canal hypoplasia, and single cochlear cavity.
Conclusions:
- Imaging findings significantly influence surgical decisions for cochlear implantation.
- Preoperative imaging aids in determining surgical candidacy, side selection, and technique.
- Accurate imaging is vital for optimizing surgical outcomes in cochlear implant patients.