title: 3D selective pulse design with variable spoke trajectories for parallel excitation.
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.
authors.affiliation: Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843-3128, USA.
authors.forename: Shuo
authors.initials: S
authors.lastname: Feng
authors.forename: Jim
authors.initials: J
authors.lastname: Ji
mesh_terms: D008279:Magnetic Resonance Imaging / Q000379:methods*; D008962:Models, Theoretical