title: Alternate k-space sampling in EPI: compensation for T2* and adjustable T2 weighting.
abstract: In this work, preliminary results are described for a modification of the MBEST sampling scheme such that image resolution can be increased while preserving image contrast. In this new approach, a single spin-echo is used in sampling k-space. The basic idea relies on acquiring a conventional EPI image from the center of k-space and applying a pi pulse to permit the acquisition of the two outer edges of k-space. Using this new approach, it is possible to obtain an enhancement in EPI image resolution, while reducing the extent of T2* weighting. As a result, the resulting images possess reduced T2* contrast and suffer less signal loss from T2* effects such as spatial variations in susceptibility and field inhomogeneity.
authors.affiliation: Department of Radiology, Ohio State University, Columbus, USA.
authors.forename: A H
authors.initials: AH
authors.lastname: Aletras
authors.forename: A M
authors.initials: AM
authors.lastname: Abduljalil
authors.forename: P M
authors.initials: PM
authors.lastname: Robitaille
mesh_terms: D001921:Brain / Q000033:anatomy & histology; D017352:Echo-Planar Imaging / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D019047:Phantoms, Imaging