Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1989-06-16
1990-01-23
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324312, G01R 3320
Patent
active
048961132
ABSTRACT:
A pulse sequence of an NMR system is disclosed which produces two spin echo signals which may be acquired. In addition, one or more gradient echos are produced and acquired. The gradient echo data is combined with the spin echo data to improve signal to noise ratio, provide T.sub.2 ' mapping, reduce motion induced artifacts, measure and correct for RF pulse imperfections, and to provide improved T.sub.2 measurement.
REFERENCES:
patent: 4684891 (1987-08-01), Feinberg
patent: 4748409 (1988-05-01), Frahm
patent: 4761613 (1988-08-01), Hinks
patent: 4766379 (1988-08-01), Miyazaki
patent: 4780675 (1988-10-01), De Meester
patent: 4792758 (1988-12-01), Sattin
patent: 4799014 (1989-01-01), Nakabayashi
patent: 4803432 (1989-02-01), Perman
patent: 4808928 (1989-02-01), Frahm
The Field Dependence of NMR Imaging: II Arguments Concerning and Optimal Field Strength; D. I. Hoult, C-N Chen, and V. J. Sank, Magnetic Resonance in Medicine, 730-746, Academic Press, Inc. (1986).
Co-pending U.S. patent application Ser. No. 276,088, Pelc et al, filed Nov. 23, 1988.
General Electric Company
Tokar Michael J.
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