✦ LIBER ✦

Coupled-spin fast spin-echo MR imaging

✍ Scribed by R. Todd Constable; Robert C. Smith; John C. Gore

Publisher: John Wiley and Sons
Year: 1993
Tongue: English
Weight: 811 KB
Volume: 3
Category: Article
ISSN: 1053-1807
DOI: 10.1002/jmri.1880030319

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Distinguishing between lipid and water‐containing tissues is clinically important. Current techniques rely on the chemical shift difference between fat and water resonances or differences in relaxation times of the tissues, or a combination of both. A method is presented for separating the signals of lipid protons from those of water protons by using fast spin‐echo magnetic resonance imaging based on the principle that lipid protons behave differently from water protons in mul‐tiecho sequences. Two images are acquired with different echo train lengths and echo spacing but with identical TEs, and then subtracted to exploit differences in the behavior of lipid and water protons in mul‐tiecho sequences. The method is insensitive to B~0~ inhomoge‐neities or susceptibility effects and provides separate lipid and water images with a high signal‐to‐noise ratio. The advantages of the method are demonstrated with phantom studies and clinical examples.

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