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. 2025 Aug;135(8):2901-2906.
doi: 10.1002/lary.32114. Epub 2025 Apr 1.

Artifact Reduction 3.0 T MRI in Cochlear Implantation Recipient With Diametrically Bipolar Magnets

Xiaoqing Cen  1 , Meng Wang  2 , Chunxiang Zhou  2 , Huiwen Zhuang  1 , Jincangjian Sun  1 , Qin Xiong  1 , Kaitian Chen  1 , Guanxia Xiong  1
Affiliations

Artifact Reduction 3.0 T MRI in Cochlear Implantation Recipient With Diametrically Bipolar Magnets

Xiaoqing Cen et al. Laryngoscope. 2025 Aug.

Abstract

Objectives: This study aims to explore the clinical results of the MAVRIC-SL sequence in 3.0 Tesla (T) magnetic resonance imaging (MRI) examination of cochlear implant recipients with diametrically bipolar magnets.

Study design: Retrospective study.

Methods: Six consecutive patients implanted with diametrically bipolar magnets received a 3.0 T MRI for necessary reexaminations. The artifact volumes (cm3) and maximum artifact areas (cm2) were measured before and after applying the MAVRIC-SL. Adverse events, including discomfort or pain (measured using VAS), skin temperatures, and magnet displacement, were also recorded.

Results: All enrolled patients completed the MRI scans. Significant reductions in artifact volumes and maximum areas were observed with the MAVRIC-SL sequence compared to others (p < 0.05 to < 0.01). Targeted disease regions, as well as the inner ear anatomy, were clearly revealed with MAVRIC-SL. One patient (aged 12) reported pain (VAS score: 8) during the scan, while others (aged 10-36) did not experience discomfort. Neither displacement nor tilt of the internal magnet was seen.

Conclusion: The MAVRIC-SL sequence represents a feasible and safe solution for 3 T MRI in cochlear implanters with diametrically bipolar magnets, providing a new option to meet clinical needs.

Keywords: MAVRIC‐SL; 3.0 T MRI; artifact reduction; cochlear implantation; diametrically bipolar magnets.

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