Normal mastoid series with cochlear implant

Case contributed by Amanda Er


Elective right cochlear implant placement after a decreased hearing ability in the right ear for two weeks.

Patient Data

Age: 85 years
Gender: Male

Normal examination. The right cochlear implant and its electrodes are in a satisfactory position.

Case Discussion

This case is an example of a normal mastoid series comprising of the PA skull and modified Stenvers views. These two views make up the protocol for x-ray imaging of cochlear implants at the department that this patient presented at.

As the electrodes of the cochlear implant are threaded through the superior semicircular canal during the operation, it is imperative that this canal is demonstrated clearly and in-profile. Doing so will allow the individual electrode elements in the array past the point of cochleostomy to be counted (see magnified oblique image).

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.