Simultaneous acquisition of spatial harmonics (SMASH): Fast imaging with radiofrequency coil arrays

Daniel K. Sodickson, Warren J. Manning

    Research output: Contribution to journalArticle

    Abstract

    Simultaneous Acquisition of Spatial Harmonics (SMASH) is a new fast- imaging technique that increases MR image acquisition speed by an integer factor over existing fast-imaging methods, without significant sacrifices in spatial resolution or signal-to-noise ratio. Image acquisition time is reduced by exploiting spatial information inherent in the geometry of a surface coil array to substitute for some of the phase encoding usually produced by magnetic field gradients. This allows for partially parallel image acquisitions using many of the existing fast-imaging sequences. Unlike the data combination algorithms of prior proposals for parallel imaging, SMASH reconstruction involves a small set of MR signal combinations prior to Fourier transformation, which can be advantageous for artifact handling and practical implementation. A twofold savings in image acquisition time is demonstrated here using commercial phased array coils on two different MR- imaging systems. Larger time savings factors can be expected for appropriate coil designs.

    Original languageEnglish (US)
    Pages (from-to)591-603
    Number of pages13
    JournalMagnetic resonance in medicine
    Volume38
    Issue number4
    DOIs
    StatePublished - Oct 1997

    Keywords

    • Fast imaging
    • MR image reconstruction
    • RF coil array
    • Simultaneous acquisition

    ASJC Scopus subject areas

    • Radiology Nuclear Medicine and imaging

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