𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Linear phase-error correction for improved water and fat separation in dual-echo dixon techniques

✍ Scribed by Jingfei Ma; Zachary Slavens; Wei Sun; Ersin Bayram; Lloyd Estowski; Ken-Pin Hwang; James Akao; Anthony T. Vu

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
642 KB
Volume
60
Category
Article
ISSN
0740-3194

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Large and spatially‐linear phase errors along the frequency‐encode direction may be induced by several common and hard‐to‐avoid system imperfections such as eddy currents. For data acquired in dual‐echo Dixon techniques, the linear phase error can be more aggravated when compared to that acquired in a single echo and can pose challenges to a phase‐correction algorithm necessary for successful Dixon processing. In this work, we propose a two‐step process that first corrects the linear component of the phase errors with a modified Ahn‐Cho algorithm (Ahn CB and Cho ZH, IEEE Trans. Med. Imaging 6:32, 1987) and then corrects the residual phase errors with a previously‐developed region‐growing algorithm (Ma J, Magn. Res. Med. 52:415, 2004). We demonstrate that successive application of the two‐step process to data from a dual‐echo Dixon technique provides a “1‐2 punch” to the overall phase errors and can overcome local water and fat separation failures that are observed when the region‐growing–based algorithm is applied alone. Magn Reson Med 60:1250–1255, 2008. © 2008 Wiley‐Liss, Inc.

📜 SIMILAR VOLUMES

Two-point dixon fat–water separation: Im
Two-point dixon fat–water separation: Improving reliability and accuracy in phase correction algorithms
✍ Maria A. Schmidt; Karlene M. Fraser 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 599 KB

## Abstract ## Purpose To propose an advanced phase‐correction region‐growing algorithm for two‐point fat–water separation suitable for parotid assessment, and to evaluate the general performance of phase‐correction algorithms. ## Materials and Methods Two region‐growing algorithms were evaluate

Breath-hold water and fat imaging using
Breath-hold water and fat imaging using a dual-echo two-point dixon technique with an efficient and robust phase-correction algorithm
✍ Jingfei Ma 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 199 KB

## Abstract A two‐point Dixon technique using a novel phase‐correction algorithm and commercially available dual‐echo fast gradient‐echo pulse sequence is presented. The phase‐correction algorithm determines the directional rather than phase distribution of signals due to field inhomogeneities. Spe