Multiple chemical-shift-selective NMR imaging using stimulated echoes

Axel Haase, Jens Frahm

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92 Scopus citations


A new technique for chemical-shift-selective (CHESS) NMR imaging is described which enables cross-sectional imaging of positively selected, i.e., frequency-selective excited, resonance lines. The method relies on NMR sequences comprising three 90° rf pulses and detecting a so-called stimulated echo. Stimulated echo acquisition mode (STEAM) imaging has been described in a preceding paper. Here modified pulse and gradient sequences are reported that allow chemical-shift-selective imaging. Basically, image contributions belonging to a chemical component with a certain resonance frequency within an NMR spectrum can be selected by replacing one of the 90° pulses of a STEAM imaging sequence by a frequency-selective pulse. In particular, a "composite" image and an arbitrary number of CHESS images may be acquired simultaneously from the same slice. The extension of the combined CHESS STEAM experiment to multislice imaging is demonstrated.

Original languageEnglish
Pages (from-to)94-102
Number of pages9
JournalJournal of Magnetic Resonance (1969)
Issue number1
StatePublished - Aug 1985
Externally publishedYes


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