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

Optimizing blood vessel contrast in fast three-dimensional MRI.

E M Haacke1, T J Masaryk, P A Wielopolski

  • 1University Hospitals of Cleveland, Department of Radiology, Ohio 44106.

Magnetic Resonance in Medicine
|May 1, 1990
PubMed
Summary

Optimized 3D magnetic resonance angiography (MRA) techniques provide clinically useful cranial vessel images in under 30 minutes. Specific sequences like ROAST and FLASH achieve high resolution for accurate stenosis detection.

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

Quantifying Brain Iron in Hereditary Hemochromatosis Using R2* and Susceptibility Mapping.

AJNR. American journal of neuroradiology·2022
Same author

More on Exploiting the T1 Shinethrough and T2* Effects Using Multiecho Susceptibility-Weighted Imaging.

AJNR. American journal of neuroradiology·2021
Same author

Quantifying Tissue Properties of the Optic Radiations Using Strategically Acquired Gradient Echo Imaging and Enhancing the Contrast Using Diamagnetic Susceptibility Weighted Imaging.

AJNR. American journal of neuroradiology·2020
Same author

Intracranial iron distribution and quantification in aceruloplasminemia: A case study.

Magnetic resonance imaging·2020
Same author

Spiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical Evaluation.

AJNR. American journal of neuroradiology·2020
Same author

Increased iron deposition of deep cerebral gray matter structures in hemodialysis patients: A longitudinal study using quantitative susceptibility mapping.

Journal of magnetic resonance imaging : JMRI·2018

Area of Science:

  • Radiology
  • Medical Imaging
  • Biophysics

Background:

  • Magnetic resonance angiography (MRA) has advanced, enabling rapid acquisition of clinically relevant images.
  • Three-dimensional (3D) imaging techniques are crucial for detailed visualization of vascular structures.

Purpose of the Study:

  • To evaluate optimal imaging parameters, sequences, and reconstruction techniques for moving spins in 3D MRA.
  • To determine the best methods for high-resolution imaging of cranial vessels and carotids.

Main Methods:

  • Evaluation of a variant of Fast Imaging with Steady-State Precision (FISP) known as ROAST with specific parameters (low flip angles, short repeat times, thick slab).
  • Utilized sagittal scout sequences with short echo times (TE) for fast-flowing vessels.
  • Employed thin slab 3D, thin partition, larger flip angle, longer repeat time FLASH sequences for localization.

Related Experiment Videos

  • Investigated half-Fourier, 512 acquisition, small fields of view, and constrained reconstruction for gradient echo and spin-echo sequences.

    • Main Results:

    • ROAST yielded the best 3D survey scan of cranial vessels at approximately 1x1x1 mm resolution.
    • Short TE sagittal scouts are necessary for imaging fast-flowing carotids, preventing spin dephasing.
    • Recommended resolution of 0.5-0.75 mm for consistent clinical interpretation of stenoses and abnormalities.

    Conclusions:

    • Optimized 3D MRA techniques, including ROAST and FLASH sequences, allow for rapid and high-resolution imaging of cranial vasculature.
    • Achieving resolutions of 0.5-0.75 mm is critical for accurate diagnosis of vascular conditions like stenosis.