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

Active-passive gradient shielding for MRI acoustic noise reduction.

William A Edelstein1, Tesfaye K Kidane, Victor Taracila

  • 1MRScience LLC, Schenectady, NY 12309, USA. wedelst1@nycap.rr.com

Magnetic Resonance in Medicine
|April 22, 2005
PubMed
Summary

A passive metal shield can significantly reduce MRI acoustic noise from magnet cryostat vibrations. This innovation promises quieter MRI systems with noise levels below 70 dB.

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

Real-time patient-specific microwave ablation zone prediction via a unified bioheat solver and MRI-informed perturbation learning.

Medical image analysis·2026
Same author

Clarifying the conflation of biochar carbon stability and its soil co-benefits.

Biochar·2026
Same author

Sustainable resource management with bone char-challenges and opportunities for enhancing soil health and phosphorus stocks.

Biochar·2026
Same author

Biochar reshapes soil bacterial community composition and survival strategies: a meta-analysis revealing trade-offs between microbial stability and functional complexity.

Biology and fertility of soils·2026
Same author

Addition of inorganic nitrogen significantly increases the real and apparent priming effects of polyethylene and PHBV microplastics in soil.

Journal of hazardous materials·2025
Same author

Restoring degraded agricultural peatlands: how rewetting, biochar, and iron sulphate synergistically modify microbial hotspots and carbon storage.

Biochar·2025

Area of Science:

  • Medical Physics
  • Acoustics
  • Materials Science

Background:

  • Magnetic Resonance Imaging (MRI) systems generate significant acoustic noise.
  • A primary source of this noise is magnet cryostat vibrations caused by eddy-current-induced forces.
  • Existing MRI systems often exceed acceptable noise levels, impacting patient comfort and diagnostic quality.

Purpose of the Study:

  • To investigate a passive shielding method for mitigating MRI acoustic noise.
  • To evaluate the effectiveness of a metal shield in reducing vibrations and noise within the MRI warm bore.
  • To explore the potential for developing quieter MRI systems.

Main Methods:

  • Utilized finite-element (FE) calculations to model a z-gradient system.
  • Simulated the effect of a 2-mm-thick copper (Cu) layer applied to the gradient assembly.

Related Experiment Videos

  • Analyzed the reduction in mechanical power deposition and acoustic noise production.

    • Main Results:

    • The copper shield demonstrated a significant decrease in mechanical power deposition in the warm bore.
    • Calculations indicated a reduction in warm-bore acoustic noise production by approximately 25 dB.
    • Identified the conducting warm bore and other magnet components as key noise sources.

    Conclusions:

    • A passive metal shield is an effective method for mitigating MRI acoustic noise.
    • Implementing such shields can lead to substantially quieter MRI operation.
    • This technology paves the way for developing fully functioning MRI systems with noise levels below 70 dB.