Document Detail


Fat/water separation in single acquisition steady-state free precession using multiple echo radial trajectories.
MedLine Citation:
PMID:  16217786     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Phase detection in fully refocused SSFP imaging has recently allowed fat/water separation without preparing the magnetization or using multiple acquisitions. Instead, it exploits the phase difference between fat and water at an echo time at the midpoint of the TR. To minimize the TR for improved robustness to B0 inhomogeneity, a 3D projection acquisition collecting two half echoes at the beginning and end of each excitation was previously implemented. Since echoes are not formed at the midpoint of the TR, this method still requires two passes of k-space for fat/water separation. A new method is presented to linearly combine the half echoes to separate fat and water in a single acquisition. Separation using phase detection provides superior contrast between fat and water voxels. Results from high resolution angiography and musculoskeletal studies with improved robustness to inhomogeneity and a 50% scan time reduction compared to the two pass method are presented.
Authors:
Aiming Lu; Thomas M Grist; Walter F Block
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Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine     Volume:  54     ISSN:  0740-3194     ISO Abbreviation:  Magn Reson Med     Publication Date:  2005 Nov 
Date Detail:
Created Date:  2005-11-01     Completed Date:  2006-01-23     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8505245     Medline TA:  Magn Reson Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1051-7     Citation Subset:  IM    
Copyright Information:
(c) 2005 Wiley-Liss, Inc.
Affiliation:
Department of Biomedical Engineering, University of Wisconsin, Madison, WI 53792-3252, USA.
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MeSH Terms
Descriptor/Qualifier:
Adipose Tissue / anatomy & histology*
Algorithms
Ankle Joint / anatomy & histology,  blood supply,  metabolism
Echo-Planar Imaging / methods*
Feasibility Studies
Humans
Image Enhancement / methods*
Magnetic Resonance Angiography / methods*
Muscle, Skeletal / anatomy & histology*,  blood supply,  metabolism*
Water / metabolism*
Grant Support
ID/Acronym/Agency:
8 R01 EB002075-06/EB/NIBIB NIH HHS
Chemical
Reg. No./Substance:
7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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