Real-time interactive MRI on a conventional scanner

Adam B. Kerr, John M. Pauly, Bob S. Hu, King C. Li, Christopher J. Hardy, Craig H. Meyer, Albert Macovski, Dwight G. Nishimura

Research output: Contribution to journalArticlepeer-review


A real-time interactive MRI system capable of localizing coronary arteries and imaging arrhythmic hearts in real-time is described. Non-2DFT acquisition strategies such as spiral-interleaf, spiral-ring, and circular echo-planar imaging provide short scan times on a conventional scanner. Real- time gridding reconstruction at 8-20 images/s is achieved by distributing the reconstruction on general-purpose UNIX workstations. An X-windows application provides interactive control. A six-interleaf spiral sequence is used for cardiac imaging and can acquire six images/s. A sliding window reconstruction achieves display rates of 16-20 images/s. This allows cardiac images to be acquired in real-time, with minimal motion and flow artifacts, and without breath holding or cardiac gating. Abdominal images are acquired at over 2.5 images/e with spiral-ring or circular echo-planar sequences. Reconstruction rates are 8-10 images/s. Rapid localization in the abdomen is demonstrated with the spiral-ring acquisition, whereas peristaltic motion in the small bowel is well visualized using the circular echo-planar sequence.

Original languageEnglish (US)
Pages (from-to)355-367
Number of pages13
JournalMagnetic Resonance in Medicine
Issue number3
StatePublished - Sep 1997
Externally publishedYes


  • Fluoroscopy
  • Interactive
  • MRI
  • Real-time

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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