Comparison of single‐shot localization methods (steam and press) for In vivo proton NMR spectroscopy

Chrit T.W. Moonen, Markus Von Kienlin, Peter C.M. Van Zijl, Jack Cohen, Joe Gillen, Peter Daly, Gerald Wolf

Research output: Contribution to journalArticle

Abstract

Two single‐shot localization techniques, STEAM and PRESS, are analyzed with regard to specifications for in vivo localized proton NMR. In particular, attention is paid to optimum signal intensity per unit volume, sensitivity to motion and diffusion, shortest attainable echo time, water suppression and editing possibilities. Experimental results are shown for cat brain at 4.7 T and human brain at 1.5 T. Both STEAM and PRESS are highly effective localization methods. For long echo times, PRESS is the method of choice, because it offers a factor of two gain in signal intensity. In addition, the method is less sensitive to motion and diffusion, and not susceptible to multiple‐quantum effects. STEAM offers advantages for observation of (coupled) metabolites with short T2, because (a) shorter TEs can be attained and (b) effective water suppression sequences can be implemented without penalty in echo time. Differences relating to editing possibilities and B1 dependence, possibly important in choosing a method, are discussed.

Original languageEnglish (US)
Pages (from-to)201-208
Number of pages8
JournalNMR in biomedicine
Volume2
Issue number5-6
DOIs
StatePublished - Dec 1989
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Medicine
  • Radiology Nuclear Medicine and imaging
  • Spectroscopy

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