Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1991-07-15
1993-09-21
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
G01R 3320
Patent
active
052472558
ABSTRACT:
A sequence acts--preferably several times--upon an examination region, which sequence comprises two frequency-selective high-frequency pulses not exciting the water component, between which a 180.degree. high-frequency pulse is present. Such a sequence can be more insensitive to imperfections of the 180.degree. pulse in that the second frequency-selective high-frequency pulse is followed by a further frequency-selective high-frequency pulse not exciting the water component and in that between the second frequency-selective high frequency pulse and the further high-frequency pulse as well as after the further high-frequency pulse a magnetic gradient field is switched on and off in such a manner that the time integrals across this gradient field before and after the further high-frequency pulse are equal to each other.
REFERENCES:
patent: 4918387 (1990-04-01), McKinnon et al.
G. C. McKinnon & P. Boesiger, "Magnetic Resonance in Medicine", vol. 8, pp. 355-161 (1988), entitled: Communication: A One-Shot Lactate-Editing Sequence for Localized Whole-Body Spectroscopy.
Magnetic Resonance in Medicine, vol. 9, No. 2, Feb. 1989 "Single Scan Volume Selective Spectral Editing by Homonuclear Polarization Transfer" Knuttel et al.
Bosiger Peter
McKinnon Graeme
Slobod Jack D.
Tokar Michael J.
U.S. Philips Corp.
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