Synchronized EPI phase contrast velocimetry in a mixing reactor

Kevin Moser, L. Guy Raguin, John G. Georgiadis

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Notwithstanding its widespread use in cardiovascular and functional MRI studies, Echo Planar Imaging (EPI) has only recently been subjected to systematic validation studies. Most velocity measurement studies employing such ultrafast MRI methods involve the use of phantoms characterized by rigid or deformable solid motion. The current implementation involves a rotating phantom (angular velocity up to 10.5 rpm) with a superimposed swirling liquid flow (with axial velocities ranging between 0.145 and 0.27 cm/s) of water doped with copper sulfate. The standard implementation of single-shot EPI with phase contrast velocity encoding allows the complete mapping of the Eulerian velocity field in slices perpendicular to the rotation axis following a subtractive procedure requiring the synchronized acquisition of each velocity component on each selected transverse slice during two revolutions of the rotor. The image acquisition time is 100 ms (per velocity component) at each 64 × 64 slice. In addition to acquiring full-field velocity data for future direct comparisons with other techniques, EPI is employed here for the first time to reconstruct the three-dimensional flow field between the blades of a partitioned pipe mixer.

Original languageEnglish (US)
Pages (from-to)127-133
Number of pages7
JournalMagnetic Resonance Imaging
Volume21
Issue number2
DOIs
StatePublished - Jan 1 2003

Fingerprint

Echo-Planar Imaging
Rheology
Velocity measurement
Imaging techniques
Copper Sulfate
Validation Studies
Magnetic Resonance Imaging
Water
Image acquisition
Angular velocity
Magnetic resonance imaging
Flow fields
Rotors
Pipe
Copper
Liquids

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

Cite this

Moser, Kevin ; Raguin, L. Guy ; Georgiadis, John G. / Synchronized EPI phase contrast velocimetry in a mixing reactor. In: Magnetic Resonance Imaging. 2003 ; Vol. 21, No. 2. pp. 127-133.
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Synchronized EPI phase contrast velocimetry in a mixing reactor. / Moser, Kevin; Raguin, L. Guy; Georgiadis, John G.

In: Magnetic Resonance Imaging, Vol. 21, No. 2, 01.01.2003, p. 127-133.

Research output: Contribution to journalArticle

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