Cochlear Nucleus Implants

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Cochlear Implants and MRI Compatibility

In addition to 1.5T MRI with magnet in place with the use of Cochlear nucleus implant balance and splint kit, the Cochlear Nucleus Implants now have access to 3.0T MRI

Only 1 in 10 Americans Has Had an MRI1

In the rare case one needs an MRI, Cochlear has you covered. The Nucleus Profile and Freedom implants are approved for MRI for up to 3.0T with the magnet removed and 1.5T with magnet in place with use of the Cochlear Nucleus Implant Bandage and Splint Kit.

The following implants are covered by this approval:

  • Nucleus Profile: CI512, CI522, CI532
  • Nucleus CI24RE: CI422, CI24REH(L24), CI24RE(CA), and CI24RE(ST)


MRI Can Range In Strength

MRI can range in s strenght from 0.2T to 7.0T, with 1.5T being the most common. 8 out of 10 MRIs are done with 1.5T strength MRI machines2.

Given the option, 92% of radiologists would prefer to have the magnet’s removed before an MRI3

Cochlear has nearly 20 years of experience and was the first to introduce the key safety feature of removable magnet to ensure recipient safety and comfort. With Nucleus implants, if needed, the magnet is easy to remove from the top of the implant with a small incision without having to move, lift or excessively manipulate the implant. In the rare case that a recipient needs serial MRIs, a no-magnet option is available.

Additionally, the most recent advances in the Cochlear Nucleus 6 Sound Processor provide unprecedented hearing even in the most challenging listening environments, like noisy restaurants, and the ability to wirelessly connect to mobile phones, televisions and music players.4

Cochlear’s Removable Magnet Is The Gold Standard For MRI

Some advantages of the Nucleus implant magnet removal are:

  • Easy magnet removal from the top
  • Smaller incision
  • No moving or lifting of implant body
  • Magnet removal reduces the blur on MRI image, causing minimal interference with the diagnosis.5


Options for Single and Multiple MRIs

Temporary Magnet Removal*
The Cochlear™ Nucleus® cochlear implant is specifically designed for a simple, safe and efficient removal of the internal magnet in a quick single stage procedure under local anesthesia.* Unlike some other cochlear implants, the magnet removal in the Nucleus implant can be done from the top without having to lift the implant, hence, reducing the amount of manipulation of the device and allowing for a smaller incision.

Magnetless Option**
For implant users requiring multiple MRI examinations over a period of time, the Nucleus cochlear implant can be easily converted into a magnetless system. The magnet is removed and replaced with a sterile non-magnetic titanium plug. The non-magnetic plug prevents fibrous tissue from growing into the recess.

*The Cochlear Nucleus CI500 series, the Nucleus Freedom, Nucleus 24 and some Nucleus 22 implants have a removable magnet. To verify that a patient has a cochlear implant with a removable magnet, the physician should x-ray to check the lettering on the implant. If the middle character is a ‘C’, ‘G’, ‘H’, ‘J’, ‘L’, ‘P’, ‘T’, ‘2’, ‘5’ or ‘7’, the implant has a removable magnet.
**Please refer Physician’s Package Insert (PPI) for proper magnet removal procedure.

  2. “Magnetic Resonance Imaging (MRI) Market – Global Forecast to 2020” MarketsandMarkets Industry Research
  3. Radiology Poll conducted by Penn, Schoen, Berland, August 2015. Data on File.
  4. Wolfe J, Morais Duke M, Schafer E. Improving hearing performance in Cochlear™ Nucleus® 6 users with True Wireless Accessories. Denver: Cochlear Americas; 2015.
  5. F. Risi*, A. S. (2004). Magnetic resonance imaging safety of Nucleus 24 cochlear implants at 3.0 T International Congress Series. International Congress Series 1273, (pp. 394-398).