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

MRI using piecewise-linear spiral trajectory

J R Liao1, J M Pauly, N J Pelc

  • 1Department of Radiology and Electrical Engineering, Stanford, California 94305, USA.

Magnetic Resonance in Medicine
|August 1, 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

Prediction of glycosaminoglycan content in human cartilage by age, T1ρ and T2 MRI.

Osteoarthritis and cartilage·2010
Same author

Noise performance of a precision pulsed electromagnet power supply for magnetic resonance imaging.

IEEE transactions on medical imaging·2008
Same author

Visualization of hemodynamics in a silicon aneurysm model using time-resolved, 3D, phase-contrast MRI.

AJNR. American journal of neuroradiology·2006
Same author

Performance of a static-anode/flat-panel x-ray fluoroscopy system in a diagnostic strength magnetic field: a truly hybrid x-ray/MR imaging system.

Medical physics·2005
Same author

First use of a truly-hybrid X-ray/MR imaging system for guidance of brain biopsy.

Acta neurochirurgica·2003
Same author

Flow effects in balanced steady state free precession imaging.

Magnetic resonance in medicine·2003
Same journal

Suppression of Oscillation and Ghosting in RF-Spoiled Gradient-Echo-Based Dynamic Imaging.

Magnetic resonance in medicine·2026
Same journal

A Simple, Dynamic Geometric Phantom for MRI and CT Reconstruction Pipelines: Beyond Shepp-Logan.

Magnetic resonance in medicine·2026
Same journal

7T 3D-EPI PCASL With High SNR Efficiency and Robustness to Through-Plane B<sub>0</sub> Field Gradients.

Magnetic resonance in medicine·2026
Same journal

A Comparison of Tissue Property Values Estimated Using Conventional Cardiac MRF and MT-Cardiac MRF.

Magnetic resonance in medicine·2026
Same journal

Dependence of the Extra-Cellular Diffusion Coefficient on the Fractions of Neurites and Cell Bodies in Gray Matter.

Magnetic resonance in medicine·2026
Same journal

Triple-Pulse <sup>23</sup>Na MRI Sequence (TriNa) for Simultaneous Acquisition of Spin-Density-Weighted and Fluid-Attenuated Images.

Magnetic resonance in medicine·2026
See all related articles

New magnetic resonance imaging (MRI) gradient systems enable faster scans but limit gradient slew rates. A novel piecewise-linear spiral MRI trajectory reduces the slew rate duty cycle, allowing faster imaging on these advanced systems.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Technology
  • Gradient Coil Systems

Background:

  • Advanced gradient systems in MRI offer faster imaging and shorter echo times.
  • These systems often have limitations on gradient slew rate duty cycle.
  • Traditional circular spiral trajectories are incompatible with these limitations due to 100% duty cycle requirements.

Purpose of the Study:

  • To introduce a novel piecewise-linear spiral trajectory for MRI.
  • To reduce the gradient slew rate duty cycle while preserving desirable imaging properties.
  • To enable the use of spiral trajectories on high-power gradient systems.

Main Methods:

  • Development of a piecewise-linear spiral trajectory with linear segments and rounded corners.

Related Experiment Videos

  • Implementation of a conventional gridding method for image reconstruction.
  • Creation of a new numerical algorithm for density compensation factor calculation.

    • Main Results:

    • The piecewise-linear spiral trajectory significantly reduces the slew rate duty cycle (e.g., to 46% in one example).
    • Desirable imaging properties of circular spirals, such as interleaving by gradient rotation, are maintained.
    • The developed trajectory effectively mitigates the impact of slew rate limitations.

    Conclusions:

    • Piecewise-linear spiral trajectories are a viable solution for MRI on systems with slew rate limitations.
    • This approach facilitates faster MRI acquisition and broader adoption of spiral imaging techniques.
    • The method allows for efficient imaging without compromising image quality or trajectory benefits.