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Simultaneous acquisition of gradient-echo and asymmetric spin-echo for single-shot z-shim: Z-SAGA

✍ Scribed by Keith Arron Heberlein; Xiaoping Hu

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
148 KB
Volume
51
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

This article describes the Z‐SAGA pulse sequence, a technique for recovering susceptibility losses in EPI images for neuroimaging applications. The pulse sequence is based on an asymmetric spin echo EPI sequence and acquires a gradient echo image and an asymmetric spin echo image in a single shot. For one of the images, a z‐shim gradient pulse is applied to compensate for susceptibility‐related field distortions. The two images are combined to form an image with reduced signal loss. This sequence is simple to implement and experimentally demonstrated to be effective for BOLD imaging. Magn Reson Med 51:212–216, 2004. © 2003 Wiley‐Liss, Inc.

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