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Related Experiment Videos

Simultaneous multislice acquisition with arterial-flow tagging (SMART) using echo planar imaging (EPI)

Y H Kao1, X Wan, J R MacFall

  • 1Department of Radiology, Duke University Medical Center, Durham, North Carolina 27710, USA.

Magnetic Resonance in Medicine
|April 16, 1998
PubMed
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Simultaneous Multislice Acquisition with aRterial-flow Tagging (SMART) enables faster, multislice MRI perfusion imaging. This technique doubles spatial coverage without compromising image quality or signal-to-noise ratio compared to single-slice methods.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Physics
  • Biomedical Engineering

Background:

  • Arterial spin tagging (AST) is a non-invasive MRI technique for imaging tissue perfusion.
  • Current AST methods predominantly use time-consuming single-slice imaging sequences.
  • There is a need for faster, more efficient AST techniques to improve clinical utility.

Purpose of the Study:

  • To introduce a novel multislice echo-planar arterial spin tagging technique.
  • To demonstrate the feasibility of simultaneous multislice acquisition for AST.
  • To evaluate the performance of the new technique against conventional single-slice methods.

Main Methods:

  • Developed Simultaneous Multislice Acquisition with aRterial-flow Tagging (SMART) technique.

Related Experiment Videos

  • Utilized multiband RF encoding (Hadamard) for simultaneous multislice acquisition.
  • Implemented a two-slice pulse sequence using FAIR (Flow-Sensitive Alternative Inversion Recovery) for perfusion imaging.

    • Main Results:

    • The two-slice SMART sequence successfully generated two simultaneous perfusion-weighted images.
    • Image quality and signal-to-noise ratio were comparable to single-slice AST sequences.
    • Achieved twice the spatial coverage within the same scan time as single-slice techniques.

    Conclusions:

    • SMART offers a significant advancement in MRI perfusion imaging efficiency.
    • The technique enables faster scanning and increased anatomical coverage for AST.
    • SMART has the potential to improve diagnostic capabilities and patient throughput in clinical MRI.