Contrast-modified gradient echo imaging using rotary echo preparatory pulses

X. P. Zhu, P. B. Chilvers, C. E. Hutchinson, G. A. Morris, J. M. Hawnaur, J. E. Adams, C. J. Taylor

    Research output: Contribution to journalArticlepeer-review


    The use of on-resonance 121 binomial composite pulses in two- or three- dimensional magnetization-prepared gradient-recalled echo magnetic resonance imaging experiments generates rotary echoes, leading to an increase in contrast range that is, in part, determined by the ratio of T2 to T1. In comparison with other fast gradient-recalled echo imaging techniques designed for enhanced T2 contrast, this method is more robust with respect to radiofrequency field inhomogeneity and less sensitive with respect to motion artifacts. Three-dimensional parametric images may be calculated using least- squares fitting based on a simple model for steady-state longitudinal magnetization during the imaging sequences.
    Original languageEnglish
    Pages (from-to)193-200
    Number of pages7
    JournalMagma: Magnetic Resonance Materials in Physics, Biology, and Medicine
    Issue number3
    Publication statusPublished - 1997


    • Fast gradient-recalled echo imaging
    • Magnetization preparation
    • MRI
    • Rotary echo
    • T2/T1 ratio


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