Zigzag sampling for improved parallel imaging

Felix A. Breuer, Hisamoto Moriguchi, Nicole Seiberlich, Martin Blaimer, Peter M. Jakob, Jeffrey L. Duerk, Mark A. Griswold

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Conventional Cartesian parallel MRI methods are limited to the sensitivity variations provided by the underlying receiver coil array in the dimension in which the data reduction is carried out, namely, the phase-encoding directions. However, in this work an acquisition strategy is presented that takes advantage of sensitivity variations in the readout direction, thus improving the parallel imaging reconstruction process. This is achieved by employing rapidly oscillating phase-encoding gradients during the actual readout. The benefit of this approach is demonstrated in vivo using various zigzag-shaped gradient trajectory designs. It is shown that zigzag type sampling, in analogy to CAIPIRINHA, modifies the appearance of aliasing in 2D and 3D imaging, thereby utilizing additional sensitivity variations in the readout direction directly resulting in improved parallel imaging reconstruction performance.

Original languageEnglish (US)
Pages (from-to)474-478
Number of pages5
JournalMagnetic Resonance in Medicine
Issue number2
StatePublished - Aug 2008
Externally publishedYes


  • MRI
  • Parallel imaging
  • Zigzag sampling

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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