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Snapshot imaging using a FLARE sequence.

R A Jones1, P A Rinck

  • 1MR-Centre, SINTEF/UNIMED, Trondheim, Norway.

Magnetic Resonance in Medicine
|October 1, 1991
PubMed
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We developed a fast snapshot FLARE sequence for rapid imaging. This technique allows T2 weighting adjustment and reduced radiofrequency power deposition, improving imaging of short T2 samples.

Area of Science:

  • Magnetic Resonance Imaging
  • Biomedical Engineering

Background:

  • Fast imaging is crucial for reducing motion artifacts.
  • FLARE (Fluid Attenuated Inversion Recovery) sequences are widely used for T2-weighted imaging.
  • Optimizing FLARE for speed and specific tissue properties remains an area of research.

Purpose of the Study:

  • To implement and evaluate a snapshot Fast Low Angle SHot Echo REcalled (FLARE) sequence.
  • To assess the feasibility of rapid T2-weighted imaging with adjustable contrast.
  • To investigate methods for reducing radiofrequency power deposition and image blurring.

Main Methods:

  • A snapshot FLARE sequence was implemented with a scan time of 320 ms for a 64 x 128 image.
  • T2 weighting was manipulated by altering the phase encoding scheme.

Related Experiment Videos

  • The flip angle of the refocusing pulse was reduced to minimize radiofrequency power deposition and blurring.

    • Main Results:

    • The implemented snapshot FLARE sequence achieved rapid image acquisition.
    • T2 weighting was successfully controlled by adjusting the phase encoding.
    • Reducing the refocusing pulse flip angle decreased radiofrequency power deposition and blurring in short T2 samples.
    • A trade-off was observed between signal/contrast reduction and decreased power deposition/blurring.

    Conclusions:

    • Snapshot FLARE enables fast, T2-weighted imaging with adjustable contrast.
    • Reducing the refocusing pulse flip angle is an effective strategy for improving image quality in short T2 samples.
    • This sequence holds potential for applications requiring rapid and efficient T2-weighted imaging.