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

Dynamic shimming for multi-slice magnetic resonance imaging

G Morrell1, D Spielman

  • 1Department of Electrical Engineering, Stanford University, California, USA.

Magnetic Resonance in Medicine
|October 27, 1997
PubMed
Summary
This summary is machine-generated.

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

Integration of wildlife veterinarians into emergency management: developing an Australian and New Zealand College of Veterinary Scientists chapter-led position statement.

New Zealand veterinary journal·2025
Same author

Lung worm (Marsupostrongylus spp.) infection in common brushtail possums (Trichosurus vulpecula).

Australian veterinary journal·2023
Same author

Mammary neoplasia in common brushtail possums: case report and retrospective identification of additional cases.

Australian veterinary journal·2020
Same author

Erratum.

Australian veterinary journal·2016
Same author

Canine neural angiostrongylosis: a case-control study in Sydney dogs.

Australian veterinary journal·2015
Same author

Canine neural angiostrongylosis: a case-control study in Sydney dogs.

Australian veterinary journal·2015

Dynamic shimming improves MRI quality by adjusting magnetic field gradients for each slice during scans. This method enhances imaging results compared to using a single setting for the entire scan.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Physics

Background:

  • Achieving optimal magnetic field homogeneity is crucial for high-quality MRI.
  • Traditional static shimming methods often fail to correct for dynamic field variations within the imaging volume.

Purpose of the Study:

  • To implement and evaluate a dynamic shimming technique for a commercial 1.5-T MRI system.
  • To assess the performance improvement of dynamic shimming across different MRI pulse sequences.

Main Methods:

  • Developed a dynamic shimming protocol involving multi-slice field map acquisition before each imaging sequence.
  • Calculated slice-specific linear shim terms and center frequencies in real-time.
  • Integrated dynamic shimming into fat saturation spin-echo, single-shot echo-planar, and spiral gradient-recalled echo sequences.

Related Experiment Videos

Main Results:

  • Dynamic shimming significantly improved image quality compared to static shimming across all tested pulse sequences.
  • Slice-specific optimization of shim currents and center frequencies yielded superior results.
  • The dynamic shimming process, including field map acquisition and calculation, was completed within seconds.

Conclusions:

  • Dynamic shimming is an effective method for enhancing MRI performance on commercial systems.
  • This technique offers improved image quality by adapting magnetic field corrections to individual slices.
  • Minimal modifications are required to implement dynamic shimming, making it a practical advancement for MRI acquisition.