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Imaging for cochlear implants.

P D Phelps1, J A Annis, P J Robinson

  • 1Department of Radiology, Royal National Throat, Nose and Ear Hospital, London.

The British Journal of Radiology
|July 1, 1990
PubMed
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Computed tomography (CT) and magnetic resonance imaging (MRI) are crucial for assessing severe hearing loss in patients considered for cochlear implants. Imaging aids in selecting the best surgical candidates and surgical side for sound amplification devices.

Area of Science:

  • Otolaryngology
  • Medical Imaging
  • Neurosurgery

Background:

  • Severe deafness can result from conditions like otosclerosis and labyrinthitis ossificans.
  • Sound amplification devices, including extracochlear and intracochlear implants, offer significant benefits for select patients.
  • Pre-operative imaging is essential for patient selection and surgical planning.

Purpose of the Study:

  • To evaluate the role of imaging in the selection and pre-operative assessment of patients for cochlear implantation.
  • To present experiences with 165 patients undergoing assessment for sound amplification devices.

Main Methods:

  • Thin-section computed tomography (CT) in axial and coronal planes for petrous temporal bone imaging.
  • Magnetic resonance imaging (MRI) to assess inner ear fluid filling.

Related Experiment Videos

  • Polytomography for visualizing multichannel implants within the cochlea.

    • Main Results:

    • Out of 165 assessed patients, 69 were deemed suitable for cochlear implants.
    • CT effectively demonstrated causes of deafness such as otosclerosis and labyrinthitis ossificans.
    • Imaging guided the selection of the most suitable side for surgical intervention.

    Conclusions:

    • Imaging, particularly thin-section CT, plays a vital role in the pre-operative evaluation for cochlear implants.
    • MRI and polytomography have specific roles in confirming inner ear status and implant placement.
    • While not used for congenital deformities in this study, observations were made regarding inner ear structural abnormalities.