Ultra-fast velocity imaging in stenotically produced turbulent jets using RUFIS

David P. Madio, H. Michael Gach, Irving J. Lowe

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


A method for rapidly producing velocity images is presented. This sequence combines a modified bipolar gradient pulse to magnitude encode the velocity with the rotating ultra-fast imaging sequence (RUFIS) to image the encoded spins. Velocity encoding is done in 3 msec, and RUFIS acquires 32 projections in 8 msec. The method is applied to turbulent jets associated with a 75% stenosis in a 15-mm inner diameter glass pipe. Data is acquired upstream and downstream from the stenosis for Reynolds numbers from 560 to 3750. In addition, a robust method of reconstructing the unobserved short time region of a free induction decay is presented and incorporated into the Image processing.

Original languageEnglish
Pages (from-to)574-580
Number of pages7
JournalMagnetic resonance in medicine
Issue number4
StatePublished - Apr 1998


  • K-space reconstruction
  • Stenosis
  • Turbulent jets
  • Ultra-fast velocity imaging


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