Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1982-11-22
1985-03-19
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324307, G01R 3308
Patent
active
045062234
ABSTRACT:
Selective excitation is used to excite to resonance nuclear spins located in a predetermined region of an NMR sample. Variable amplitude gradients are then used to phase encode spatial information into the NMR signal produced by the excited nuclear spins. Fourier transformation of the NMR signal, observed in the absence of magnetic field gradients, yields information of the spatial distribution of chemical shifts in the predetermined region of the NMR sample. In NMR chemical shift imaging methods using multiple angle projection reconstruction techniques, projections are built up along a gradient point-by-point by use of selective RF pulses having variable frequency content. Non-selective 180.degree. RF pulses are used with the imaging methods to produce NMR spin echo signals.
REFERENCES:
patent: 4319190 (1982-03-01), Brown
patent: 4339716 (1982-07-01), Young
patent: 4355282 (1982-10-01), Young et al.
patent: 4361807 (1982-11-01), Burl et al.
Bottomley Paul A.
Edelstein William A.
Davis Jr. James C.
General Electric Company
Krauss Geoffrey H.
Snyder Marvin
Tokar Michael J.
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