Free-breathing whole-heart coronary MRA with 3D radial SSFP and self-navigated image reconstruction

C. Stehning, P. Börnert, K. Nehrke, H. Eggers, M. Stuber

Research output: Contribution to journalArticlepeer-review

Abstract

Respiratory motion is a major source of artifacts in cardiac magnetic resonance imaging (MRI). Free-breathing techniques with pencil-beam navigators efficiently suppress respiratory motion and minimize the need for patient cooperation. However, the correlation between the measured navigator position and the actual position of the heart may be adversely affected by hysteretic effects, navigator position, and temporal delays between the navigators and the image acquisition. In addition, irregular breathing patterns during navigator-gated scanning may result in low scan efficiency and prolonged scan time. The purpose of this study was to develop and implement a self-navigated, free-breathing, whole-heart 3D coronary MRI technique that would overcome these shortcomings and improve the ease-of-use of coronary MRI. A signal synchronous with respiration was extracted directly from the echoes acquired for imaging, and the motion information was used for retrospective, rigid-body, through-plane motion correction. The images obtained from the self-navigated reconstruction were compared with the results from conventional, prospective, pencil-beam navigator tracking. Image quality was improved in phantom studies using self-navigation, while equivalent results were obtained with both techniques in preliminary in vivo studies.

Original languageEnglish (US)
Pages (from-to)476-480
Number of pages5
JournalMagnetic resonance in medicine
Volume54
Issue number2
DOIs
StatePublished - Aug 2005

Keywords

  • 3D radial
  • Coronary angiography
  • Motion detection
  • Self-navigation
  • Whole-heart MRI

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Fingerprint Dive into the research topics of 'Free-breathing whole-heart coronary MRA with 3D radial SSFP and self-navigated image reconstruction'. Together they form a unique fingerprint.

Cite this