Tailored SMASH image reconstructions for robust in vivo parallel MR imaging

Daniel K. Sodickson

    Research output: Contribution to journalArticle

    Abstract

    The simultaneous acquisition of spatial harmonics (SMASH) imaging technique uses spatial information from an array of RF coils to substitute for omitted encoding gradient steps and thereby to accelerate MR image acquisition. Since SMASH image reconstructions rely on the accurate generation of sinusoidally varying composite sensitivity functions to emulate the spatial modulations produced by gradients, the technique was originally believed to be limited to certain image planes or coil array configurations which were particularly suited to the generation of spatial harmonics. Several key improvements to the SMASH reconstruction procedure are described, taking advantage of various degrees of freedom in the spatial harmonic fit. The use of tailored fitting procedures, in combination with a numerical conditioning approach based on new observations about noise propagation in the fit, are shown to allow high-quality SMASH image reconstructions in oblique and double-oblique image planes, both in phantoms and in high-resolution cardiac MR images. (C) 2000 Wiley-Liss, Inc.

    Original languageEnglish (US)
    Pages (from-to)243-251
    Number of pages9
    JournalMagnetic resonance in medicine
    Volume44
    Issue number2
    DOIs
    StatePublished - 2000

    Keywords

    • Cardiac MRI
    • Parallel MRI
    • Rapid imaging
    • SMASH imaging

    ASJC Scopus subject areas

    • Radiology Nuclear Medicine and imaging

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