SMASH imaging with an eight element multiplexed RF coil array

James A. Bankson, Mark A. Griswold, Steven M. Wright, Daniel K. Sodickson

    Research output: Contribution to journalArticle

    Abstract

    SMASH (SiMultaneous Acquisition of Spatial Harmonics) is a technique which can be used to acquire multiple lines of k-space in parallel, by using spatial information from a radiofrequency coil array to perform some of the encoding normally produced by gradients. Using SMASH, imaging speed can be increased up to a maximum acceleration factor equal to the number of coil array elements. This work is a feasibility study which examines the use of SMASH with specialized coil array and data reception hardware to achieve previously unattainable accelerations. An eight element linear SMASH array was designed to operate in conjunction with a time domain multiplexing system to examine the effectiveness of SMASH imaging with as much as eightfold acceleration factors. Time domain multiplexing allowed the multiple independent array elements to be sampled through a standard single-channel receiver. SMASH-reconstructed images using this system were compared with reference images, and signal to noise ratio and reconstruction artifact power were measured as a function of acceleration factor. Results of the imaging experiments showed an almost constant SNR for SMASH acceleration factors of up to eight. Artifact power remained low within this range of acceleration factors. This study demonstrates that efficient SMASH imaging at high acceleration factors is feasible using appropriate hardware, and that time domain multiplexing is a convenient strategy to provide the multiple channels required for rapid imaging with large arrays. (C) 2000 Elsevier Science B.V.

    Original languageEnglish (US)
    Pages (from-to)93-104
    Number of pages12
    JournalMagnetic Resonance Materials in Physics, Biology and Medicine
    Volume10
    Issue number2
    DOIs
    StatePublished - Jun 1 2000

    Keywords

    • Arrays
    • MRI
    • Parallel imaging
    • RF coils
    • SMASH

    ASJC Scopus subject areas

    • Biophysics
    • Radiological and Ultrasound Technology
    • Radiology Nuclear Medicine and imaging

    Fingerprint Dive into the research topics of 'SMASH imaging with an eight element multiplexed RF coil array'. Together they form a unique fingerprint.

  • Cite this