title: A Nyquist modulated echo-to-view mapping scheme for fast spin-echo imaging.
abstract: A new scheme for assignment of echoes to views in fast spin-echo imaging was developed. The scheme places early and late echoes in alternating lines of the periphery of k-space; continued alternation of echoes arising closer to the middle of the echo train encodes the central portion of k-space. The scheme has two effects: a) The echo-to-echo signal decay that usually gives rise to multiple faint ghosts, now yields a single Nyquist ghost that is removed by phase over-sampling. b) Mapping earlier echoes (and thus more energy) to the periphery of k-space yields sharper edges.
authors.affiliation: Department of MRI Research, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona 85013-4496, USA.
authors.forename: P J
authors.initials: PJ
authors.lastname: Keller
authors.forename: J E
authors.initials: JE
authors.lastname: Heiserman
authors.forename: E K
authors.initials: EK
authors.lastname: Fram
authors.forename: S D
authors.initials: SD
authors.lastname: Rand
authors.forename: B P
authors.initials: BP
authors.lastname: Drayer
mesh_terms: D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*