Alternate k-space sampling in EPI: Compensation for T2* and adjustable T2 weighting

✍ Scribed by Anthony H. Aletras; Amir M. Abduljalil; Pierre-Marie L. Robitaille

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 477 KB
• Volume: 35
• Category: Article
• ISSN: 0740-3194
• DOI: 10.1002/mrm.1910350424

✦ Synopsis

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 ψ 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 T~2~* weighting. As a result, the resulting images possess reduced T~2~* contrast and suffer less signal loss from T~2~* effects such as spatial variations in susceptibility and field inhomogeneity.