'Crisscross' MR imaging: Improved resolution by averaging signals with swapped phase-encoding axes

C. A. Hamilton, A. D. Elster, J. L. Ulmer

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

At conventional magnetic resonance imaging, the number of phase-encoding steps is often chosen to be less than the number of readout samples, resulting in reduced spatial resolution in the phase-encoding direction. Signal averaging improves the signal-to-noise ratio of the image but does not affect this asymmetry in resolution. By swapping the phase- and frequency- encoding directions between excitations and averaging the resultant data sets ('crisscross' imaging), equal spatial resolution can be obtained in both principal directions. Increased spatial resolution can be obtained with this method with no increase in imaging time, and the method can potentially be applied in echo-planar and three-dimensional Fourier transform imaging.

Original languageEnglish
Pages (from-to)276-279
Number of pages4
JournalRadiology
Volume193
Issue number1
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

Keywords

  • Magnetic resonance (MR), image processing
  • Magnetic resonance (MR), k- space
  • Magnetic resonance (MR), technology

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