Premium
Optimizing PRESS localized citrate detection at 3 Tesla
Author(s) -
Trabesinger Andreas H.,
Meier Dieter,
Dydak Ulrike,
Lamerichs Rolf,
Boesiger Peter
Publication year - 2005
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20544
Subject(s) - spin (aerodynamics) , nuclear magnetic resonance , coupling (piping) , physics , echo time , line (geometry) , computer science , operator (biology) , basis (linear algebra) , point (geometry) , computational physics , algorithm , chemistry , biological system , mathematics , materials science , magnetic resonance imaging , medicine , biochemistry , geometry , radiology , repressor , gene , transcription factor , metallurgy , thermodynamics , biology
Abstract Analytical methods are used to characterize the response of the strongly coupled two‐spin system of citrate to point‐resolved spectroscopy (PRESS)‐based sequences at 3 T. The signal output is analyzed line by line, as well as in the Cartesian product operator basis. Patterns with a periodicity of 80.9 ms are identified. Furthermore, it is shown that at TE = n · 80.9 ms ( n ∈ {0,1,2,…}), the spin evolution can be described without direct reference to strong coupling terms. The theoretical results are found to be in good agreement with in vivo experiments. These results can be used to design protocols for prostate MRS and MRSI at 3 T, and give guidelines for optimizing spin‐echo‐based acquisition schemes for detecting two‐spin systems at arbitrary field strengths. Magn Reson Med 54:51–58, 2005. © 2005 Wiley‐Liss, Inc.