Embedded MR fluoroscopy: High temporal resolution real-time imaging during high spatial resolution 3D MRA acquisition

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13 Scopus citations

Abstract

A method termed "embedded fluoroscopy" for simultaneously acquiring a real-time sequence of 2D images during acquisition of a 3D image is presented. The 2D images are formed by periodically sampling the central phase encodes of the slab-select direction during the 3D acquisition. The tradeoffs in spatial and temporal resolution are quantified by two parameters: the "redundancy" (R), the fraction of the 3D acquisition sampled more than once; and the "effective temporal resolution" (T), the time between temporal updates of the central views. The method is applied to contrast-enhanced MR angiography (CE-MRA). The contrast bolus dynamics are portrayed in real time in the 2D image sequence while a high-resolution 3D image is being acquired. The capability of the 2D acquisition to measure contrast enhancement with only a 5% degradation of the spatial resolution of the 3D CE-MR angiogram is shown theoretically. The method is tested clinically in 15 CE-MRA patient studies of the carotid and renal arteries.

Original languageEnglish (US)
Pages (from-to)690-698
Number of pages9
JournalMagnetic Resonance in Medicine
Volume46
Issue number4
DOIs
StatePublished - 2001

Keywords

  • Contrast-enhanced 3D MR angiography
  • MR fluoroscopy
  • Perfusion MRI
  • Real-time MRI
  • Vascular MRI

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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