Navigated single‐voxel proton spectroscopy of the human liver
作者:
J. Michael Tyszka,
Jeffrey M. Silverman,
期刊:
Magnetic Resonance in Medicine
(WILEY Available online 1998)
卷期:
Volume 39,
issue 1
页码: 1-5
ISSN:0740-3194
年代: 1998
DOI:10.1002/mrm.1910390102
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: magnetic resonance spectroscopy;liver;motion correction
数据来源: WILEY
摘要:
AbstractThe addition of a navigator echo acquisition to a1H spectroscopy sequence allows retrospective motion correction using acceptance criteria based on measured displacement of the diaphragm. This technique has been applied to the acquisition of short echo‐time1H spectroscopy of the liver in seven normal subjects. Navigation correction significantly improved overall spectral quality as measured by the phase variance, linewidth and suppression ratio of the water resonance. The hepatic choline resonance was consistently observed in all navigated spectra. Retrospective navigation makes close to optimal use of data acquisition time and, unlike external respiratory transducers, allows direct measurement of diaphragm displacement. The reconstruction of multiple voxel spectra from a single data set was also demonstrate
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