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Anatomy of the Ear

Anatomy of the Ear

Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...

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Related Experiment Video

Updated: Jul 6, 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

Bionic ear imaging.

R Cerini¹, N Faccioli, M Barillari

¹Istituto di Radiologia, Università di Verona, Piazzale L.A. Scuro, Verona, Italy. roberto.cerini@azosp.vr.it

La Radiologia Medica

|April 4, 2008

Summary

This summary is machine-generated.

Imaging techniques like CT, CBCT, and radiography effectively visualize middle and inner ear implants. Cone-beam CT (CBCT) offers lower radiation doses than CT for implant site visualization.

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

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Area of Science:

Radiology
Otolaryngology
Medical Imaging

Background:

Hearing loss necessitates various implantable devices.
Accurate post-surgical imaging is crucial for assessing implant placement and function.

Purpose of the Study:

To illustrate the distinct imaging features of middle/inner ear, brainstem, and inferior colliculus implants.
To compare the efficacy of different imaging modalities for these implants.

Main Methods:

Retrospective review of CT scans from 468 patients with hearing loss who underwent surgery.
Analysis of Vibrant Soundbridge, cochlear, brainstem, and inferior colliculus implants.
Utilized CT, cone-beam CT (CBCT), and plain-film radiography for postoperative imaging.

Main Results:

CBCT provides superior visualization of Vibrant Soundbridge implant sites compared to plain radiography, with reduced radiation exposure.
Plain radiography in Stenvers projection is sufficient for visualizing cochlear implant electrodes.
Postoperative CT is used for brainstem/inferior colliculus implants to rule out complications, but follow-up can be done with radiography alone.

Conclusions:

CT and CBCT are reliable for precise localization of middle ear implants.
CBCT is preferred over CT due to lower radiation dose.
Plain-film radiography is adequate for visualizing and monitoring cochlear, brainstem, and inferior colliculus implants.