Document Detail


A new T2 preparation technique for ultrafast gradient-echo sequence.
MedLine Citation:
PMID:  7808267     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The T2 contrast in images obtained with driven equilibrium (90degreesx-180degreesx-90degreesx) prepared ultrafast gradient-echo sequence is compromised by the longitudinal magnetization build-up after the second 90degreesx pulse, which does not carry T2 information. This paper describes a new T2 contrast preparation technique for ultrafast gradient-echo sequence that suppresses the signal arising from the build-up. By dephasing in the preparation and rephasing in the acquisition of the gradient echoes, the new technique eliminates signals that are not dictated by the T2 contrast in a driven-equilibrium approach. Consequently, it generates an image that is essentially T2-weighted. Phantom and in vivo experiments were conducted to validate the technique and to demonstrate its clinical utility. These studies indicate that the technique works properly and can be used for in vivo studies.
Authors:
T Parrish; X Hu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine     Volume:  32     ISSN:  0740-3194     ISO Abbreviation:  Magn Reson Med     Publication Date:  1994 Nov 
Date Detail:
Created Date:  1995-02-02     Completed Date:  1995-02-02     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:  652-7     Citation Subset:  IM    
Affiliation:
Department of Radiology, University of Minnesota, Minneapolis.
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MeSH Terms
Descriptor/Qualifier:
Animals
Artifacts
Brain / anatomy & histology
Contrast Media
Dogs
Electrocardiography
Gadolinium / diagnostic use
Gadolinium DTPA
Heart / anatomy & histology
Humans
Image Enhancement / methods*
Magnetic Resonance Imaging / methods*
Magnetics
Models, Structural
Organometallic Compounds / diagnostic use
Pentetic Acid / analogs & derivatives,  diagnostic use
Reproducibility of Results
Signal Processing, Computer-Assisted
Grant Support
ID/Acronym/Agency:
RR 08079/RR/NCRR NIH HHS
Chemical
Reg. No./Substance:
0/Contrast Media; 0/Organometallic Compounds; 67-43-6/Pentetic Acid; 7440-54-2/Gadolinium; 80529-93-7/Gadolinium DTPA

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


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