CC BY-NC-ND 4.0 · Laryngorhinootologie 2021; 100(S 02): S25
DOI: 10.1055/s-0041-1727659
Abstracts
Imaging / Sonography: Ear / Temporal Bone

MRI Metal Artifact Reduction through Customized Sequence and Optimized Head Positioning with Transcutaneous Bone Conduction Implants

W Wimmer
1   HNO Klinik, Inselspital, Bern, Switzerland, Bern, Switzerland
,
F Wagner
2   Neuroradiologie, Inselspital, Bern, Switzerland, Bern, Switzerland
,
H Arsani
2   Neuroradiologie, Inselspital, Bern, Switzerland, Bern, Switzerland
,
C Kiefer
2   Neuroradiologie, Inselspital, Bern, Switzerland, Bern, Switzerland
,
L Anschuetz
1   HNO Klinik, Inselspital, Bern, Switzerland, Bern, Switzerland
,
M Caversaccio
1   HNO Klinik, Inselspital, Bern, Switzerland, Bern, Switzerland
› Author Affiliations
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    Content

    Introduction In patients with hearing implants, magnetic resonance imaging (MRI) is often not possible or of limited use due to the presence of metallic components and magnets. The aim of this ongoing study is to evaluate the diagnostic value of an adapted MRI sequence and the influence of the head position on the suppression of metal artifacts in patients with Bonebridge implants.

    Methods Two whole head specimens were unilaterally implanted with transcutaneous bone conduction implants (Bonebridge BCI 601 and BCI 602). MRI examinations with and without a custom sequence (SEMAC-VAT WARP) for metal artifact suppression were performed. The diagnostic usefulness of the acquired MRI scans was rated independently by two neuroradiologists.

    Results The customized SEMAC-VAT WARP sequence significantly improved the diagnostic usefulness of the postimplantation MRIs. The image acquisition time was 12 min and 20 s for the T1-weighted and 12 min and 12 s for the T2-weighted MRI. There was good agreement between the two blinded raters (Cohen’s κ = 0.61, p  <  0.001). The influence of the head position on imaging artifacts is currently evaluated.

    Conclusion The sequence for metal artifact reduction enables MRI at 1.5 T in patients with active transcutaneous bone conduction implants with increased diagnostic imaging quality.

    Poster-PDF A-1712.pdf


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    Conflict of interest

    The first author points out the following conflict of interest: Die Studie wurde zum Teil durch die Firma Med-El GmbH unterstützt.

    Address for correspondence

    Wimmer Wilhelm
    HNO Klinik, Inselspital, Bern, Switzerland
    Bern
    Switzerland   

    Publication History

    Article published online:
    13 May 2021

    © 2021. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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