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Related Experiment Videos

SYS-FLASH. Systemic saturation in FLASH MR imaging.

D Matthaei, A Haase

    Magnetic Resonance in Medicine
    |March 1, 1987
    PubMed
    Summary
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    A new technique called Systemic Saturation FLASH (SYS-FLASH) modifies Fast Low Angle SHot (FLASH) MR imaging. This method effectively reduces blood flow intensity and artifacts in transaxial images.

    Area of Science:

    • Medical Imaging
    • Magnetic Resonance Imaging
    • Biomedical Engineering

    Background:

    • Fast Low Angle SHot (FLASH) Magnetic Resonance (MR) imaging is susceptible to flow artifacts.
    • Flowing blood can significantly alter image intensity and diagnostic accuracy in transaxial tomograms.

    Purpose of the Study:

    • To introduce a simple modification to FLASH MR imaging to reduce blood flow signals and artifacts.
    • To present a novel technique, SYstemic Saturation FLASH (SYS-FLASH), for improved image quality.

    Main Methods:

    • A nonselective radiofrequency pulse of variable flip angle was applied before each projection in FLASH imaging.
    • This pulse was used to saturate flowing blood within the entire imaging volume, creating the SYS-FLASH technique.

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    Main Results:

    • The SYS-FLASH modification resulted in a variable reduction of flowing blood intensity.
    • This technique effectively decreased flow artifacts observed in transaxial tomograms.

    Conclusions:

    • SYS-FLASH is a simple and effective modification for FLASH MR imaging.
    • The technique offers improved image quality by mitigating blood flow artifacts.