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Updated: Jul 7, 2026
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Robotic Cochlear Implantation for Direct Cochlear Access
Published on: June 16, 2022
Magnetic resonance imaging with the Digisonic SP Neurelec cochlear implant
C Vincent1, I Ruzza, F M Vaneecloo
1Otology and Neurotology Department, CHRU de Lille, Hôpital Salengro, 59037 Lille Cédex, France. otologie@chru-lille.fr
Summary
The Neurelec Digisonic SP cochlear implant is safe for MRI scans, showing no adverse effects. However, expect image distortion around the implant during magnetic resonance imaging.
Area of Science:
- Biomedical Engineering
- Medical Device Safety
- Neuroscience
Background:
- Cochlear implants are crucial for hearing restoration.
- MRI compatibility is essential for patients with cochlear implants.
- The Neurelec Digisonic SP is a specific cochlear implant model requiring safety evaluation.
Purpose of the Study:
- To assess the MR compatibility of the Neurelec Digisonic SP cochlear implant.
- To evaluate potential risks and effects during 1.5 T MRI scans.
- To ensure patient and device safety during magnetic resonance imaging.
Main Methods:
- Conducted in vitro tests measuring torque, force, demagnetization, induced voltage, and heating.
- Performed in vivo MRI scans (brain, posterior fossa) on a volunteer.
- Adhered to EN 45502-2-3 standards for cochlear implant testing.
Main Results:
- In vitro tests confirmed compliance with safety standards.
- In vivo MRI showed a maximum image distortion of 7 cm around the internal magnet for spin echo sequences.
- No measurable adverse effects on the patient or device were observed.
Conclusions:
- The Neurelec Digisonic SP cochlear implant is MR compatible at 1.5 T.
- MRI is feasible for patients with this cochlear implant, with manageable image artifacts.
- The study supports the safe use of this device in MRI environments.
