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Multiple-angle, variable-interval, nonorthogonal MRI.

M A Reicher, R B Lufkin, S Smith

    AJR. American Journal of Roentgenology
    |August 1, 1986
    PubMed
    Summary
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    Multiple-angle, variable-interval, nonorthogonal (MAVIN) MRI offers faster imaging by allowing independent slice angle and position selection. This technique reduces scan times for complex anatomical regions like the spine and knee.

    Area of Science:

    • Medical Imaging
    • Magnetic Resonance Imaging

    Background:

    • Conventional MRI techniques can be time-consuming, especially for multiplanar imaging.
    • Nonparallel oblique scanning often necessitates additional pulse sequences, increasing overall examination duration.

    Purpose of the Study:

    • To introduce and evaluate Multiple-angle, variable-interval, nonorthogonal (MAVIN) MRI.
    • To demonstrate MAVIN's potential for reducing examination time in specific anatomical regions.

    Main Methods:

    • MAVIN MRI allows independent selection of slice angle and position for each slice in a multiangle sequence.
    • This is achieved through precise adjustment of radiofrequency pulses and magnetic-field gradients.

    Main Results:

    • MAVIN MRI can significantly reduce examination time for studies of the lumbar spine, orbits, knees, and heart.

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  • A practical limitation is signal loss at the intersection of multiple planes due to local changes in effective repetition time.

    • Conclusions:

    • MAVIN MRI is an effective, time-saving technique for multiangle MRI acquisition.
    • Careful selection of scan planes is necessary to mitigate signal loss in regions of interest.