Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1993-12-27
1995-08-29
O'Shea, Sandra L.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324309, G01R 3348
Patent
active
054463840
ABSTRACT:
Magnetic resonance images of selected chemical species are generated by the application of a multi-band radio-frequency excitation pulse. The radio-frequency pulse excites an arbitrary number of spectral bands. As the imaging phase encoding gradient pulse is advanced, the phase of each excitation band is advanced by a unique amount. This causes the signals from the spins in a particular band to appear at a position in the phase encoding direction which is the stem of the spin position and an offset arising from the phase increment given to that excitation band. Additional selectivity of selected chemical species can be accomplished by combining the multi-band excitation with chemical shift selective saturation radio-frequency pulses and echo-time modulation.
REFERENCES:
patent: 5093619 (1992-03-01), Hennig
patent: 5225781 (1993-07-01), Glover et al.
patent: 5233298 (1993-08-01), Dumoulin
patent: 5250899 (1993-10-01), Listerud
patent: 5298862 (1994-03-01), Hennig
patent: 5347217 (1994-09-01), Leach et al.
"Simple Proton Spectroscopic Imaging", Radiology, vol. 153, pp. 189-194, 1984.
General Electric Company
Mah Raymond Y.
O'Shea Sandra L.
Snyder Marvin
Zale Lawrence P.
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