Broadband spin-locking method

Details Broadband spin-locking method Broadband spin-locking method

1989-10-23

1991-03-19

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324300, G01R 3320

Patent

active

050014277

ABSTRACT:
An NMR spectroscopy using broadband spin-locking capable of efficiently observing nuclear Overhauser effects. A 90.degree. pulse is applied to create transverse magnetization. Then, an r.f. magnetic field is applied to lock the transverse magnetization. Prior to the spin-locking, a pulse is applied to align the magnetization with the spin-locking r.f. magnetic field. Subsequent to the spin-locking, another pulse is applied to reorient the magnetization in its original direction.

REFERENCES:
patent: 3824452 (1974-07-01), Freeman
patent: 3858111 (1974-12-01), Simpson
patent: 4168462 (1979-09-01), Ernst
patent: 4297637 (1981-10-01), Crooks
patent: 4820983 (1989-04-01), Bendall
"Radiofrequency Pulse Sequences Which Compensate Their Own Imperfections", Ray Freeman, Stewart P. Kempsell and Malcolm H. Levitt, Journal of Magnetic Resonance 38, 453-479 (1980).
"Practical Aspects of Two-Dimensional Transverse NOE Spectroscopy", by Ad Bax and Donald G. Davis, Journal of Magnetic Resonance, 63, pp. 207-213 (1985).
"The Principles of Nuclear Magnetism", Chaps. 1,2, by A. Abragam, Oxford Univ. Press. London, 1961.
"Frequency Offset Effects and Their Elimination in NMR Rotating-Frame Cross-Relaxation Spectroscopy", C. Griesinger and R. R. Ernst, Journal of Magnetic Resonance, 75, 261-271 (1987).

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