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  • Title: 3D selective pulse design with variable spoke trajectories for parallel excitation.
    Author: Feng S, Ji J.
    Journal: Annu Int Conf IEEE Eng Med Biol Soc; 2011; 2011():2845-8. PubMed ID: 22254934.
    Abstract:
    Three dimensional spatial selective RF pulse of practical length has been demonstrated using parallel transmission technique in Magnetic Resonance Imaging. Currently, spoke trajectory, which is a set of parallel k-space straight lines, is widely used for 3-D slab excitation to achieve sharp slice profile and a uniform or smoothly varying in-plane profile. The better control of in-plane profile mainly comes from an increased number of spokes. In this paper, we proposed three types of modified spoke trajectories for the 3-D tailored RF pulse design which traverse k-space more efficiently. Simulations are used to characterize the proposed trajectories.
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