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Updated: Feb 19, 2026

Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion

Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion

Published on: January 17, 2025

Precurved Cochlear Implants and Tip Foldover: A Cadaveric Imaging Study.

Danielle R Trakimas^1,2,3, Elliott D Kozin^1,2, Iman Ghanad^1,2

¹1 Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA.

Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery

|November 1, 2017

Summary

This summary is machine-generated.

A new radiographic protocol reliably identifies cochlear implant electrode placement and tip foldover. This technique aids surgeons in confirming correct positioning of precurved and straight electrodes during surgery.

Keywords:

cochlear implantation intraoperative radiography perimodiolar electrode tip foldover

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Area of Science:

Otolaryngology
Medical Imaging
Biomedical Engineering

Background:

Cochlear implant electrode placement is critical for hearing restoration.
Newly designed electrodes require validated imaging techniques for accurate placement verification.
Intraoperative confirmation of electrode position prevents complications like tip foldover.

Purpose of the Study:

To establish a dependable radiographic protocol for identifying the placement and tip foldover of new cochlear implant electrodes.
To provide a standardized method for assessing electrode array positioning in the cochlea.

Main Methods:

A prospective imaging study using two fresh cadaveric specimens.
Insertion of three cochlear implant models (Cochlear, MED-EL, Advanced Bionics) in three configurations: normal, intracochlear tip foldover, and vestibular placement.
Imaging via plain radiography (Stenvers projection) and high-resolution computed tomography (HRCT).

Main Results:

Plain radiography successfully identified electrode placement and tip foldover in all nine tested scenarios.
The radiographic findings were consistently confirmed by HRCT.
Reference images of proper and improper electrode placements were generated.

Conclusions:

A defined protocol for intraoperative plain film radiography enables reliable imaging of new cochlear implant electrodes.
This technique allows immediate identification of extracochlear placement and electrode tip foldover.
The findings support the use of this protocol for intraoperative confirmation of electrode array placement.