Method of determining real-time spatially localized velocity dis

Details Method of determining real-time spatially localized velocity dis Method of determining real-time spatially localized velocity dis

1992-08-07

1994-05-03

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Determine fluid flow rate

324309, G01V 300

Patent

active

053090993

ABSTRACT:
Real-time spatially localized velocity distribution is measured using magnetic resonance techniques by first exciting a region of interest using an RF excitation pulse simultaneously with gradient pulses along two orthogonal axes. A cyclical read-out gradient is then applied along a read-out axis and a magnetic resonance signal is continuously sampled while the read-out gradient is applied. The excitation and read-out is repeated at time intervals to obtain time varying spatially localized velocities within the region of interest.

REFERENCES:
patent: 5133357 (1992-07-01), Dumoulin et al.
Demoulin et al., "Quantitative measurement of Blood Flow Using Cylindrically Localized Fourier Velocity Encoding," Magnetic Resonance in Medicine, 21:242-250 (1991) (no month).
Pearlman et al., "Real-Time MR Beam Directed Velocity Mapping: V-Mode MR Imaging," JMRI 1(2), 1991 (no month).
Walton et al., "Flow Velocity Measurements with AC Gradients," Magnetic Resonance in Medicine, 4(1), pp. 274-281 (1987) (no month).
Hu et al., "Localized Real-Time Velocity Spectra," Proceedings of 10th Meeting SMRM, Aug. 10, 1991, p. 1158.
Irarrazabal et al., "Real-Time Spatially Localized Velocity Distribution," Proceedings of Meeting SSMRM, presented in Berlin, Aug. 8, 1992.

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