Related Experiment Video
Updated: Sep 13, 2025
Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion
Published on: January 17, 2025
Anatomy-Based Fitting in Cochlear Implants: Potential for Optimizing Postoperative Outcomes: A Pilot Study
Nina Rubicz, Belinda Bauer1, Maximilian Meng2
1Department of Otorhinolaryngology, Head and Neck Surgery, Kepler University Hospital GmbH, Linz, Austria.
Objectives:
To investigate whether there is a difference in frequency parameters between anatomy-based fitting (ABF) using a preoperative CT scan and clinically based fitting (CBF).
Study Design:
Monocentric retrospective registry study.
Setting:
Tertiary academic medical center.
Patients:
23 CI recipients between 2004 and 2021.
Interventions:
CI.
Main Outcome Measures:
Comparison between frequency maps: CBF versus ABF. The frequency parameters used for ABF were estimated based on preoperative CT scans and implanted electrodes.
Results:
All electrode contact frequencies were significantly different between ABF and CBF maps. When the dataset was manually analyzed, 84% (n = 233) of the predicted electrode location frequencies were outside their allocated frequency band in the clinical fitting map.
Conclusions:
Setting the CI filter bank frequencies based on preoperative electrode location estimates could be a useful alternative when postoperative CT or DVT imaging is not feasible or unavailable. This can serve as a good starting point when trying to reduce frequency-to-place mismatch between frequency allocations of the fitting filter bank and the tonotopy of the cochlea.
