Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1990-05-18
1992-01-14
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
G01R 3320
Patent
active
050814176
ABSTRACT:
A 2-quantum selective MR sequence is proposed for the selective determination of the nuclear magnetisation distribution of a metabolite such as lacate while suppressing at the same time another metabolite such as alanine. A 2-quantum selective sequence which contains three 90.degree. pulses (p1, p2, p3) and two gradients (G1r, G2r) for the selection of 2-quantum coherence is performed twice, the polarity of one of the two gradients (G1r, G1r') being reversed. When the time interval (tb) between the second (p2) and the third (p3) pulse is suitably chosen, a spectrum of a metabolite such as lactate is selectively determined from the amplitude modulated sum signal of the resonance signals generated by the sequence.
REFERENCES:
patent: 4626783 (1986-12-01), Ohuchi
patent: 4680546 (1987-07-01), Dumoulin
patent: 4703270 (1987-10-01), Hall et al.
patent: 4843321 (1989-06-01), Sotak
patent: 4962357 (1990-10-01), Sotak
Chemical Physics Letters, 1 Feb. 1980, pp. 567-570, by A. Bax et al, "Separation of the Different Orders of NMR Multiple-Quantum Transitions by the use of Pulse Field Gradients".
Bovee Willem M. M. J.
Van Dijk Johannes E.
Squire William
Tokar Michael J.
U.S. Philips Corporation
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