Document Detail


Structure-specific magnetic field inhomogeneities and its effect on the correlation time.
MedLine Citation:
PMID:  17145406     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We describe the relationship between the correlation time and microscopic spatial inhomogeneities in the static magnetic field. The theory takes into account diffusion of nuclear spins in the inhomogeneous field created by magnetized objects. A simple general expression for the correlation time is obtained. It is shown that the correlation time is dependent on a characteristic length, the diffusion coefficient of surrounding medium, the permeability of the surface and the volume fraction of the magnetized objects. For specific geometries (spheres and cylinders), exact analytical expressions for the correlation time are given. The theory can be applied to contrast agents (magnetically labeled cells), capillary network, BOLD effect and so forth.
Authors:
Christian H Ziener; Wolfgang R Bauer; Gerd Melkus; Thomas Weber; Volker Herold; Peter M Jakob
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-10-04
Journal Detail:
Title:  Magnetic resonance imaging     Volume:  24     ISSN:  0730-725X     ISO Abbreviation:  Magn Reson Imaging     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-12-05     Completed Date:  2007-03-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8214883     Medline TA:  Magn Reson Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1341-7     Citation Subset:  IM    
Affiliation:
Bayerische Julius-Maximilians-Universität Würzburg, Lehrstuhl für Experimentelle Physik 5, 97074 Würzburg, Germany. ziener@physik.uni-wuerzburg.de
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MeSH Terms
Descriptor/Qualifier:
Magnetic Resonance Imaging*
Magnetics*
Mathematics
Models, Theoretical*

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