On improving temporal and spatial resolution of 3D contrast-enhanced body MR angiography with parallel imaging

Qun Chen*, Carla V. Quijano, Vu M. Mai, Saravanan K. Krishnamoorthy, Wei Li, Pippa Storey, Robert R. Edelman

*Corresponding author for this work

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

Use of a parallel imaging technique to improve temporal and spatial resolution at three-dimensional con-trast-enhanced magnetic resonance (MR) angiography was investigated. Thirty experiments were performed in five groups of healthy subjects. In groups 1-3, the technique was used to improve imaging speed by a factor of two or four while maintaining spatial resolution. Contrast agent concentration was two to four times higher than at standard MR angiography, to take advantage of the faster imaging speed. In groups 4 and 5, the technique was used to double spatial resolution in the phase-encoding direction while maintaining imaging speed and contrast agent concentration. At a two to four times faster imaging speed, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) almost equaled those at standard MR angiography, likely a result of increased contrast agent concentration. The use of parallel imaging to achieve higher spatial resolution was also proved feasible, but with substantial reduction in SNR and CNR.

Original languageEnglish (US)
Pages (from-to)893-899
Number of pages7
JournalRadiology
Volume231
Issue number3
DOIs
StatePublished - Jun 1 2004

Keywords

  • Magnetic resonance (MR), technology
  • Magnetic resonance (MR), three-dimensional
  • Magnetic resonance (MR), vascular studies
  • Magnetic resonance, (MR), high-resolution

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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