Reduced Field of View and Undersampled PR Combined for Interventional Imaging of a Fully Dynamic Field of View

Dana C. Peters, Michael A. Guttman, Alexander J. Dick, Venkatesh K. Raman, Robert J. Lederman, Elliot R. McVeigh

Research output: Contribution to journalArticlepeer-review

Abstract

Active catheter imaging was investigated using real-time undersampled projection reconstruction (PR) combined with the temporal filtering technique of reduced field of view (rFOV). Real-time rFOV processing was interactively enabled during highly undersampled catheter imaging, resulting in improved artifact suppression with better temporal resolution than that obtained by view-sharing. Imaging with 64 to 32 projections provided a resolution of 2 × 2 × 8 mm, and four to eight true frames per second. Image artifacts were reduced when rFOV processing was applied to the undersampled images. A comparison with Cartesian rFOV showed that PR image quality is less susceptible to aliasing that results from rFOV imaging with a wholly dynamic outer FOV. Simulations and MRI experiments demonstrated that PR rFOV provides significant artifact suppression, even for a fully dynamic FOV. The near doubling of temporal resolution that is possible with PR rFOV permits accurate monitoring of highly dynamic events, such as catheter movements, and arrhythmias, such as ventricular ectopy.

Original languageEnglish (US)
Pages (from-to)761-767
Number of pages7
JournalMagnetic resonance in medicine
Volume51
Issue number4
DOIs
StatePublished - Apr 2004

Keywords

  • Catheter tracking
  • Interventional MRI
  • Projection reconstruction
  • Radial imaging
  • Reduced field of view (rFOV)
  • Temporal filtering
  • UNFOLD

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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