Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Middle ear prosthesis displacement in high-strength magnetic fields.

M D Williams1, P J Antonelli, L S Williams

  • 1Department of Otolaryngology, University of Florida, Gainesville 32610-0264, USA.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|April 13, 2001
PubMed
Summary

Middle ear prostheses made from stainless steel showed movement in high magnetic fields during ex vivo testing. However, this movement was not clinically significant in vivo during magnetic resonance imaging (MRI).

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Antimicrobial activity of cuprous oxide-coated and cupric oxide-coated surfaces.

The Journal of hospital infection·2022
Same author

Are we assuming too much with our statistical assumptions? Lessons learned from the ALTTO trial.

Annals of oncology : official journal of the European Society for Medical Oncology·2019
Same author

Weekly paclitaxel, carboplatin, cetuximab, and cetuximab, docetaxel, cisplatin, and fluorouracil, followed by local therapy in previously untreated, locally advanced head and neck squamous cell carcinoma.

Annals of oncology : official journal of the European Society for Medical Oncology·2019
Same author

Central Nervous System and Head and Neck Histiocytoses: A Comprehensive Review on the Spectrum of Imaging Findings.

Neurographics (2011)·2018
Same author

How phenotype guides management of the neuroendocrine carcinomas of the larynx.

The Journal of laryngology and otology·2018
Same author

The effect of Nordic hamstring exercise training volume on biceps femoris long head architectural adaptation.

Scandinavian journal of medicine & science in sports·2018

Area of Science:

  • Biomaterials Science
  • Medical Imaging
  • Otolaryngology

Background:

  • Middle ear prostheses are used to restore hearing.
  • Nonmagnetic, MR-compatible prostheses are preferred for patients undergoing MRI.
  • Ex vivo studies suggest potential displacement of these prostheses in high magnetic fields.

Purpose of the Study:

  • To evaluate the magnetic field interactions of middle ear prostheses.
  • To determine the clinical significance of prosthesis displacement during MRI.

Main Methods:

  • Tested prostheses made from 316L stainless steel, platinum, and 420F stainless steel at 4.7 Tesla (T).
  • Measured ex vivo translational and rotational motion.
  • Assessed in vivo displacement in cadaveric temporal bones using clinical MRI sequences.

Related Experiment Videos

Main Results:

  • Nonmagnetic stainless steel prostheses exhibited angular deflection ex vivo.
  • Platinum controls showed no deflection; ferromagnetic controls deflected >90 degrees.
  • In vivo, nonmagnetic stainless steel prostheses remained stable after MRI; ferromagnetic prostheses displaced at 4.7 T but not 1.5 T.

Conclusions:

  • Stainless steel middle ear prostheses move ex vivo in high magnetic fields.
  • This movement is not clinically significant in vivo at 4.7 T.
  • Caution is advised for MRI in patients with strongly ferromagnetic prostheses.