Turboprop+: Enhanced turboprop diffusion-weighted imaging with a new phase correction

Chu Yu Lee, Zhiqiang Li, James G. Pipe, Josef P. Debbins

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Faster periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) diffusion-weighted imaging acquisitions, such as Turboprop and X-prop, remain subject to phase errors inherent to a gradient echo readout, which ultimately limits the applied turbo factor (number of gradient echoes between each pair of radiofrequency refocusing pulses) and, thus, scan time reductions. This study introduces a new phase correction to Turboprop, called Turboprop+. This technique employs calibration blades, which generate 2-D phase error maps and are rotated in accordance with the data blades, to correct phase errors arising from off-resonance and system imperfections. The results demonstrate that with a small increase in scan time for collecting calibration blades, Turboprop+ had a superior immunity to the off-resonance-related artifacts when compared to standard Turboprop and recently proposed X-prop with the high turbo factor (turbo factor = 7). Thus, low specific absorption rate and short scan time can be achieved in Turboprop+ using a high turbo factor, whereas off-resonance related artifacts are minimized.

Original languageEnglish (US)
Pages (from-to)497-503
Number of pages7
JournalMagnetic Resonance in Medicine
Volume70
Issue number2
DOIs
StatePublished - Aug 1 2013

Keywords

  • Turboprop
  • diffusion-weighted imaging
  • gradient and spin echo
  • off-resonance
  • periodically rotated overlapping parallel lines with enhanced reconstruction
  • phase correction

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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