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Related Experiment Videos

TSE-sequences with spin-echo contrast.

H P Fautz1, M Büchert, H Husstedt

  • 1Abt. Röntgendiagnostik, MR Tomography, University Freiburg, Freiburg, Germany.

Magnetic Resonance in Medicine
|April 5, 2000
PubMed
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New RARE (Rapid Acquisition with Relaxation Enhancement) sequences combine T2-contrast with fast imaging speeds. These modified sequences improve image contrast for abdominal imaging and CNS hemorrhage detection.

Area of Science:

  • Magnetic Resonance Imaging
  • Radiology
  • Biomedical Engineering

Background:

  • Conventional spin-echo sequences offer T2-contrast but are slow.
  • Rapid Acquisition with Relaxation Enhancement (RARE), also known as Turbo Spin Echo (TSE) or Fast Spin Echo (FSE), provides fast imaging but lacks T2-contrast.
  • A need exists for fast MRI techniques that retain T2-weighting for specific clinical applications.

Purpose of the Study:

  • To discuss the signal behavior of contrast-modified RARE sequences.
  • To introduce T2-contrast into fast RARE imaging.
  • To optimize these sequences for clinical applications like abdominal imaging and CNS hemorrhage detection.

Main Methods:

  • Modification of RARE (TSE/FSE) sequences by preceding the echo train with a long echo interval.

Related Experiment Videos

  • Implementation and optimization of modified sequences for breath-hold abdominal imaging.
  • Implementation and optimization of modified sequences for central nervous system (CNS) hemorrhage detection.

    • Main Results:

    • The modified RARE sequences successfully introduced T2-contrast, mimicking conventional spin-echo sequences.
    • High imaging speed, characteristic of RARE/TSE, was maintained.
    • Significant differences in image contrast were observed for various tissues at identical echo times compared to unmodified RARE/TSE.

    Conclusions:

    • Contrast-modified RARE sequences offer a valuable tool for fast MRI with T2-weighting.
    • These sequences enhance diagnostic capabilities in abdominal imaging and CNS hemorrhage detection.
    • The demonstrated signal behavior provides a basis for further optimization and application of these advanced MRI techniques.