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Cochlear Implants International
An Interdisciplinary Journal for Implantable Hearing Devices
Volume 21, 2020 - Issue 2
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Original articles

Dimensions of artefacts caused by cochlear and auditory brainstem implants in magnetic resonance imaging

Elham MajdaniDepartment of Otolaryngology, Hannover Medical School, Hannover, Germany
,
Omid MajdaniDepartment of Otolaryngology, Hannover Medical School, Hannover, Germany;Cluster of Excellence of the German Research Foundation (DFG; ‘Deutsche Forschungsgemeinschaft') ‘Hearing4all', Hannover, Germany
,
Melanie SteffensDepartment of Otolaryngology, Hannover Medical School, Hannover, Germany
,
Athanasia WarneckeDepartment of Otolaryngology, Hannover Medical School, Hannover, Germany;Cluster of Excellence of the German Research Foundation (DFG; ‘Deutsche Forschungsgemeinschaft') ‘Hearing4all', Hannover, GermanyCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0001-9652-1035
ORCID Icon,
Anke Lesinski-SchiedatDepartment of Otolaryngology, Hannover Medical School, Hannover, Germany
,
Thomas LenarzDepartment of Otolaryngology, Hannover Medical School, Hannover, Germany;Cluster of Excellence of the German Research Foundation (DFG; ‘Deutsche Forschungsgemeinschaft') ‘Hearing4all', Hannover, Germany
&
Friedrich GötzInstitute of Neuroradiology, Hannover Medical School, Hannover, Germany
 show all
Pages 67-74 | Published online: 25 Sep 2019
 
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Abstract

Background: The aim of the study was to investigate the extent of MRI artefacts due to the magnet of selected auditory implants.

Study design: Artefacts of the Synchrony cochlear implant at 1.5 T as well as at 3 T MRI devices were examined in cadavers and compared to the artefacts in MRI scans at 1.5 T of 17 patients implanted with CI (n = 12) and auditory brainstem implants (ABI) (n = 5).

Results: None of the scanned implants showed any failure after MRI. After removal of the magnet, only a portion of the images in the direct neighbourhood of the implant, especially in the temporal and parietal lobe, contained artefacts. More anatomical substructures were visible without artefacts using the MedEl Synchrony device.

Conclusion: Artefacts can be markedly reduced by rotating, self-aligning magnet. Removal of the magnet also results in reduction of artefacts.

ORCID

Athanasia Warnecke http://orcid.org/0000-0001-9652-1035

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