Characterization of fluid flow using low-spatial-resolution velocity spectra from NMR images.
Flow velocity distributions or spectra may be obtained by NMR imaging using an anisotropic three-dimensional Fourier transform pulse sequence in which the low-resolution direction encodes perpendicular velocity. Velocity spectra from regions of interest covering the entire lumens of pipes in a flow phantom containing straight sections, a jet, and a constriction suggest that velocity spectra provide useful information even when the vessels are not spatially well-resolved. The flow in the phantom was characterized and limited measurements were made.
Department of Radiology, Baylor College of Medicine, Houston, Texas 77030.
R E
RE
Wendt
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W
Nitz
P H
PH
Murphy
R N
RN
Bryan
D001783:Blood Flow Velocity; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008961:Models, Structural