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Updated: May 16, 2025
Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery
Published on: August 4, 2023
Artifact Reduction 3.0 T MRI in Cochlear Implantation Recipient With Diametrically Bipolar Magnets
Xiaoqing Cen1, Meng Wang2, Chunxiang Zhou2
1Department of Otorhinolaryngology, The First Affiliated Hospital, Sun Yat-sen University and Institute of Otorhinolaryngology, Sun Yat-sen University, Guangzhou, People's Republic of China.
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.
