Skip to main content
Advertisement

Main menu

  • Home
  • Content
    • Current Issue
    • Accepted Manuscripts
    • Article Preview
    • Past Issue Archive
    • Video Articles
    • AJNR Case Collection
    • Case of the Week Archive
    • Case of the Month Archive
    • Classic Case Archive
  • Special Collections
    • AJNR Awards
    • Low-Field MRI
    • Alzheimer Disease
    • ASNR Foundation Special Collection
    • Photon-Counting CT
    • View All
  • Multimedia
    • AJNR Podcasts
    • AJNR SCANtastic
    • Trainee Corner
    • MRI Safety Corner
    • Imaging Protocols
  • For Authors
    • Submit a Manuscript
    • Submit a Video Article
    • Submit an eLetter to the Editor/Response
    • Manuscript Submission Guidelines
    • Statistical Tips
    • Fast Publishing of Accepted Manuscripts
    • Graphical Abstract Preparation
    • Imaging Protocol Submission
    • Author Policies
  • About Us
    • About AJNR
    • Editorial Board
    • Editorial Board Alumni
  • More
    • Become a Reviewer/Academy of Reviewers
    • Subscribers
    • Permissions
    • Alerts
    • Feedback
    • Advertisers
    • ASNR Home

User menu

  • Alerts
  • Log in

Search

  • Advanced search
American Journal of Neuroradiology
American Journal of Neuroradiology

American Journal of Neuroradiology

ASHNR American Society of Functional Neuroradiology ASHNR American Society of Pediatric Neuroradiology ASSR
  • Alerts
  • Log in

Advanced Search

  • Home
  • Content
    • Current Issue
    • Accepted Manuscripts
    • Article Preview
    • Past Issue Archive
    • Video Articles
    • AJNR Case Collection
    • Case of the Week Archive
    • Case of the Month Archive
    • Classic Case Archive
  • Special Collections
    • AJNR Awards
    • Low-Field MRI
    • Alzheimer Disease
    • ASNR Foundation Special Collection
    • Photon-Counting CT
    • View All
  • Multimedia
    • AJNR Podcasts
    • AJNR SCANtastic
    • Trainee Corner
    • MRI Safety Corner
    • Imaging Protocols
  • For Authors
    • Submit a Manuscript
    • Submit a Video Article
    • Submit an eLetter to the Editor/Response
    • Manuscript Submission Guidelines
    • Statistical Tips
    • Fast Publishing of Accepted Manuscripts
    • Graphical Abstract Preparation
    • Imaging Protocol Submission
    • Author Policies
  • About Us
    • About AJNR
    • Editorial Board
    • Editorial Board Alumni
  • More
    • Become a Reviewer/Academy of Reviewers
    • Subscribers
    • Permissions
    • Alerts
    • Feedback
    • Advertisers
    • ASNR Home
  • Follow AJNR on Twitter
  • Visit AJNR on Facebook
  • Follow AJNR on Instagram
  • Join AJNR on LinkedIn
  • RSS Feeds

AJNR Awards, New Junior Editors, and more. Read the latest AJNR updates

Research ArticleHead and Neck Imaging

Pre- and Postoperative Imaging of Cochlear Implantation in Cadaveric Specimens Using Low-Dose Photon-Counting Detector CT

Bjoern Spahn, Franz-Tassilo Müller-Graff, Kristen Rak, Jonas Engert, Johannes Voelker, Stephan Hackenberg, Rudolf Hagen, Tilmann Neun, Bernhard Petritsch, Thorsten Alexander Bley, Jan-Peter Grunz and Henner Huflage
American Journal of Neuroradiology February 2025, 46 (2) 362-371; DOI: https://doi.org/10.3174/ajnr.A8533
Bjoern Spahn
aFrom the Department of Oto-Rhino-Laryngology (B.S., F.-T.M.-G., K.R., J.E., J.V., S.H., R.H.), Plastic, Aesthetic and Reconstructive Head and Neck Surgery and the Comprehensive Hearing Center, University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Franz-Tassilo Müller-Graff
aFrom the Department of Oto-Rhino-Laryngology (B.S., F.-T.M.-G., K.R., J.E., J.V., S.H., R.H.), Plastic, Aesthetic and Reconstructive Head and Neck Surgery and the Comprehensive Hearing Center, University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Franz-Tassilo Müller-Graff
Kristen Rak
aFrom the Department of Oto-Rhino-Laryngology (B.S., F.-T.M.-G., K.R., J.E., J.V., S.H., R.H.), Plastic, Aesthetic and Reconstructive Head and Neck Surgery and the Comprehensive Hearing Center, University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Kristen Rak
Jonas Engert
aFrom the Department of Oto-Rhino-Laryngology (B.S., F.-T.M.-G., K.R., J.E., J.V., S.H., R.H.), Plastic, Aesthetic and Reconstructive Head and Neck Surgery and the Comprehensive Hearing Center, University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Johannes Voelker
aFrom the Department of Oto-Rhino-Laryngology (B.S., F.-T.M.-G., K.R., J.E., J.V., S.H., R.H.), Plastic, Aesthetic and Reconstructive Head and Neck Surgery and the Comprehensive Hearing Center, University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Stephan Hackenberg
aFrom the Department of Oto-Rhino-Laryngology (B.S., F.-T.M.-G., K.R., J.E., J.V., S.H., R.H.), Plastic, Aesthetic and Reconstructive Head and Neck Surgery and the Comprehensive Hearing Center, University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Rudolf Hagen
aFrom the Department of Oto-Rhino-Laryngology (B.S., F.-T.M.-G., K.R., J.E., J.V., S.H., R.H.), Plastic, Aesthetic and Reconstructive Head and Neck Surgery and the Comprehensive Hearing Center, University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Tilmann Neun
cInstitute for Diagnostic and Interventional Neuroradiology (T.N.), University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Bernhard Petritsch
bDepartment of Diagnostic and Interventional Radiology (B.P., T.A.B., J.-P.G., H.H.), University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Thorsten Alexander Bley
bDepartment of Diagnostic and Interventional Radiology (B.P., T.A.B., J.-P.G., H.H.), University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Jan-Peter Grunz
bDepartment of Diagnostic and Interventional Radiology (B.P., T.A.B., J.-P.G., H.H.), University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Jan-Peter Grunz
Henner Huflage
bDepartment of Diagnostic and Interventional Radiology (B.P., T.A.B., J.-P.G., H.H.), University Hospital Würzburg, Würzburg, Germany
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Henner Huflage
  • Article
  • Figures & Data
  • Supplemental
  • Info & Metrics
  • Responses
  • References
  • PDF
Loading

This article requires a subscription to view the full text. If you have a subscription you may use the login form below to view the article. Access to this article can also be purchased.

Graphical Abstract

Figure
  • Download figure
  • Open in new tab
  • Download powerpoint

Abstract

BACKGROUND AND PURPOSE: Anatomically adapted cochlear implantation and efficient postoperative cochlear implant-fitting strategies benefit from reliable and highly detailed imaging techniques. Since image quality in CT is related to the applied radiation dose, this study aimed to evaluate low-dose cochlear imaging with a photon-counting detector by investigating the accuracy of pre- and postoperative cochlear analysis.

MATERIALS AND METHODS: Photon-counting CT images of 10 temporal bone specimens were acquired with 3 different radiation dose levels (regular dose: 27.1 mGy, low dose: 4.81 mGy, and ultra-low dose: 3.43 mGy) before and after cochlear implant electrode carrier insertion. A clinical scan protocol was used with a tube potential of 120 kV in ultra-high-resolution scan mode (detector collimation 120 × 0.2 mm). The accuracy of cochlear duct length measurements for the organ of Corti and electrode contact determination was investigated for all applied settings by 2 independent otosurgeons.

RESULTS: No substantial differences were ascertained between photon-counting CT scans performed with standard dose and dedicated low-dose imaging regarding the accuracy of neither pre- and postoperative cochlear analysis nor postoperative cochlear implant electrode analysis. Radiation dose reduction of 82.3% (low dose) and 87.3% (ultra-low dose) could be realized compared with the clinical standard protocol.

CONCLUSIONS: Ultra-high-resolution cochlear imaging is feasible with very low radiation exposure when using a first-generation photon-counting CT in combination with dedicated low-dose protocols. The accuracy of pre- and postoperative cochlear analysis with the applied dose reduction settings was comparable with a clinical regular-dose protocol.

ABBREVIATIONS:

AID
angular insertion depth
CDL
cochlear duct length
CDLLW
cochlear duct length of the lateral cochlea wall
CDLOC
cochlear duct length of the organ of Corti
CTDIvol
volume CT dose index
DLP
dose-length product
EID
energy-integrating detector
ICC
intraclass correlation coefficient
IL
insertion length
LD
low dose
PCD
photon-counting detector
RD
regular dose
SD
standard deviation
ULD
ultra-low dose
  • © 2025 by American Journal of Neuroradiology
View Full Text

Log in using your username and password

Forgot your user name or password?

Log in through your institution

You may be able to gain access using your login credentials for your institution. Contact your library if you do not have a username and password.
PreviousNext
Back to top

In this issue

American Journal of Neuroradiology: 46 (2)
American Journal of Neuroradiology
Vol. 46, Issue 2
1 Feb 2025
  • Table of Contents
  • Index by author
  • Complete Issue (PDF)
Advertisement
Print
Download PDF
Email Article

Thank you for your interest in spreading the word on American Journal of Neuroradiology.

NOTE: We only request your email address so that the person you are recommending the page to knows that you wanted them to see it, and that it is not junk mail. We do not capture any email address.

Enter multiple addresses on separate lines or separate them with commas.
Pre- and Postoperative Imaging of Cochlear Implantation in Cadaveric Specimens Using Low-Dose Photon-Counting Detector CT
(Your Name) has sent you a message from American Journal of Neuroradiology
(Your Name) thought you would like to see the American Journal of Neuroradiology web site.
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Cite this article
Bjoern Spahn, Franz-Tassilo Müller-Graff, Kristen Rak, Jonas Engert, Johannes Voelker, Stephan Hackenberg, Rudolf Hagen, Tilmann Neun, Bernhard Petritsch, Thorsten Alexander Bley, Jan-Peter Grunz, Henner Huflage
Pre- and Postoperative Imaging of Cochlear Implantation in Cadaveric Specimens Using Low-Dose Photon-Counting Detector CT
American Journal of Neuroradiology Feb 2025, 46 (2) 362-371; DOI: 10.3174/ajnr.A8533

Citation Manager Formats

  • BibTeX
  • Bookends
  • EasyBib
  • EndNote (tagged)
  • EndNote 8 (xml)
  • Medlars
  • Mendeley
  • Papers
  • RefWorks Tagged
  • Ref Manager
  • RIS
  • Zotero
0 Responses
Respond to this article
Share
Bookmark this article
Cochlear Implant Imaging with Low-Dose CT
Bjoern Spahn, Franz-Tassilo Müller-Graff, Kristen Rak, Jonas Engert, Johannes Voelker, Stephan Hackenberg, Rudolf Hagen, Tilmann Neun, Bernhard Petritsch, Thorsten Alexander Bley, Jan-Peter Grunz, Henner Huflage
American Journal of Neuroradiology Feb 2025, 46 (2) 362-371; DOI: 10.3174/ajnr.A8533
del.icio.us logo Twitter logo Facebook logo Mendeley logo
  • Tweet Widget
  • Facebook Like
  • Google Plus One
Purchase

Jump to section

  • Article
    • Graphical Abstract
    • Abstract
    • ABBREVIATIONS:
    • MATERIALS AND METHODS
    • RESULTS
    • DISCUSSION
    • CONCLUSIONS
    • Footnotes
    • References
  • Figures & Data
  • Supplemental
  • Info & Metrics
  • Responses
  • References
  • PDF

Related Articles

  • PubMed
  • Google Scholar

Cited By...

  • No citing articles found.
  • Crossref
  • Google Scholar

This article has not yet been cited by articles in journals that are participating in Crossref Cited-by Linking.

More in this TOC Section

  • FDG Uptake and Thyroid Cancer Post-BRAF Therapy
  • Normal Facial Nerve Enhancement on VIBE Sequence
  • Comprehensive Review of Inner Ear Anatomy on Photon-Counting CT
Show more Head and Neck Imaging

Similar Articles

Advertisement

Indexed Content

  • Current Issue
  • Accepted Manuscripts
  • Article Preview
  • Past Issues
  • Editorials
  • Editor's Choice
  • Fellows' Journal Club
  • Letters to the Editor
  • Video Articles

Cases

  • Case Collection
  • Archive - Case of the Week
  • Archive - Case of the Month
  • Archive - Classic Case

More from AJNR

  • Trainee Corner
  • Imaging Protocols
  • MRI Safety Corner

Multimedia

  • AJNR Podcasts
  • AJNR Scantastics

Resources

  • Turnaround Time
  • Submit a Manuscript
  • Submit a Video Article
  • Submit an eLetter to the Editor/Response
  • Manuscript Submission Guidelines
  • Statistical Tips
  • Fast Publishing of Accepted Manuscripts
  • Graphical Abstract Preparation
  • Imaging Protocol Submission
  • Evidence-Based Medicine Level Guide
  • Publishing Checklists
  • Author Policies
  • Become a Reviewer/Academy of Reviewers
  • News and Updates

About Us

  • About AJNR
  • Editorial Board
  • Editorial Board Alumni
  • Alerts
  • Permissions
  • Not an AJNR Subscriber? Join Now
  • Advertise with Us
  • Librarian Resources
  • Feedback
  • Terms and Conditions
  • AJNR Editorial Board Alumni

American Society of Neuroradiology

  • Not an ASNR Member? Join Now

© 2025 by the American Society of Neuroradiology All rights, including for text and data mining, AI training, and similar technologies, are reserved.
Print ISSN: 0195-6108 Online ISSN: 1936-959X

Powered by HighWire