Asymmetric sampling along k(slice-select) in two-dimensional ultislice MRI

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11 Scopus citations


Reduction of the slice-select refocusing gradient in two-dimensional multislice imaging results in asymmetry of the k-space representation of Collected data along the slice-select direction. Standard methods of partial Fourier reconstruction developed for other methods of asymmetric k-space sampling can be used to reconstruct these data with final through-plane resolution smaller than the collected slice thickness. This method can be used for reducing scan time in the same manner as asymmetric sampling in the phase-encoded direction. In addition, the reduced refocusing gradient reduces minimum TE and motion artifacts in the same manner as for asymmetric sampling in the frequency-encoded direction (fractional echoes). Results using a resolution phantom and a flow phantom illustrate these concepts.

Original languageEnglish (US)
Pages (from-to)625-634
Number of pages10
JournalMagnetic Resonance in Medicine
Issue number4
StatePublished - Apr 1998


  • Asymmetric sampling
  • K-space
  • Pulse sequence
  • RF pulses

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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