Field inhomogeneity correction and data processing for spectroscopic imaging

A. A. Maudsley, S. K. Hilal

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

To obtain separate NMR images of spatially resolved high-resolution chemical-shift information the effects of magnetic field inhomogeneity must be accounted for. A suitable correction method is described which relies on first generating a plot of the magnetic field distribution. Using these data the spectroscopic imaging data can be processed to display the spatial distributions of separate resonances without distortion from field inhomogeneity. The field plot is obtained by using the same data acquisition sequence while imaging a phantom object or in particular cases the plot may be derived from the spectroscopic imaging data set itself. The correction procedure is illustrated using proton in vivo imaging of a cat. Some additional data processing techniques are presented which offer alternative methods of displaying spectroscopic imaging data.

Original languageEnglish (US)
Pages (from-to)218-233
Number of pages16
JournalMagnetic Resonance in Medicine
Volume2
Issue number3
DOIs
StatePublished - Jun 1985
Externally publishedYes

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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