title: A strategy for sampling on a sphere applied to 3D selective RF pulse design.
abstract: Conventional constant angular velocity sampling of the surface of a sphere results in a higher sampling density near the two poles relative to the equatorial region. More samples, and hence longer sampling time, are required to achieve a given sampling density in the equatorial region when compared with uniform sampling. This paper presents a simple expression for a continuous sample path through a nearly uniform distribution of points on the surface of a sphere. Sampling of concentric spherical shells in k-space with the new strategy is used to design 3D selective inversion and spin-echo pulses. These new 3D selective pulses have been implemented and verified experimentally.
authors.affiliation: Lawrence Berkeley Laboratory, University of California, Berkeley 94720.
authors.forename: S T
authors.initials: ST
authors.lastname: Wong
authors.forename: M S
authors.initials: MS
authors.lastname: Roos
mesh_terms: D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D009622:Noise