Related Experiment Video
Updated: Jun 21, 2025
03:58
Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion
Published on: January 17, 2025
408
Automatic localization of cochlear implant electrodes using cone beam computed tomography images
Jasmin Thormählen1, Benjamin Krüger1,2, Waldo Nogueira3,4
1Department of Otolaryngology, Hannover Medical School, Karl-Wiechert-Allee 3, 30625, Hannover, Germany.
Biomedical Engineering Online
|July 10, 2024
Summary
Automated cochlear implant electrode localization from CBCT scans is improved by a new cost function. This method enhances detection rates and accuracy without needing individual cochlea anatomy data.
Area of Science:
- Medical Imaging
- Biomedical Engineering
- Neurosurgery
Background:
- Cochlear implants (CI) use electrodes to stimulate the auditory nerve for hearing restoration.
- Cone beam computed tomography (CBCT) visualizes electrode positions post-implantation.
- Manual electrode localization from CBCT is time-consuming in clinical practice.
Purpose of the Study:
- Optimize automated electrode localization from CBCT data after CI implantation.
- Evaluate automated localization performance across various electrode array types.
- Identify and address sources of error in automated electrode detection.
Main Methods:
- Analyzed 150 CBCT datasets from 10 different electrode array types.
- Utilized an in-house implementation of the Noble and Dawant method as a benchmark.
- Developed an optimized strategy based on performance analysis and error classification.
Main Results:
- Deep insertion and distantly spaced electrodes caused apical-basal confusions, impacting accuracy.
- These confusions led to missed or incorrect electrode assignments.
- Performance variations were observed across different electrode array types.
Conclusions:
- Proposed an extended cost function to prevent double detections and resolve apical-basal confusions.
- Achieved an 11.15% increase in detection rate and 0.53 mm improvement in localization accuracy.
- The novel cost function requires no prior knowledge of individual cochlea anatomy.
