MRI of coronary vessel walls using radial k-space sampling and steady-state free precession imaging

Marcus Katoh, Elmar Spuentrup, Arno Buecker, Tobias Schaeffter, Matthias Stuber, Rolf W. Günther, Rene M. Botnar

Research output: Contribution to journalArticlepeer-review

Abstract

OBJECTIVE. The objective of our study was to investigate the impact of radial k-space sampling and steady-state free precession (SSFP) imaging on image quality in MRI of coronary vessel walls. SUBJECTS AND METHODS. Eleven subjects were examined on a 1.5-T MR system using three high-resolution navigator-gated and cardiac-triggered 3D black blood sequences (cartesian gradient-echo [GRE], radial GRE, and radial SSFP) with identical spatial resolution (0.9 x 0.9 x 2.4 mm3). The signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), vessel wall sharpness, and motion artifacts were analyzed. RESULTS. The mean SNR and CNR of the coronary vessel wall were improved using radial imaging and were best using radial k-space sampling combined with SSFP imaging. Vessel border definition was similar for all three sequences. Radial k-space sampling was found to be less sensitive to motion. Consistently good image quality was seen with the radial GRE sequence. CONCLUSION. Radial k-space sampling in MRI of coronary vessel walls resulted in fewer motion artifacts and improved SNR and CNR. The use of SSFP imaging, however, did not result in improved coronary vessel wall visualization.

Original languageEnglish (US)
Pages (from-to)S401-S406
JournalAmerican Journal of Roentgenology
Volume186
Issue number6 SUPPL. A
DOIs
StatePublished - Jun 1 2006

Keywords

  • Angiography
  • Arteriosclerosis
  • Cardiovascular imaging
  • Coronary artery disease
  • Hemodynamics
  • MR angiography
  • MRI
  • Radial k-space sampling

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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