Method for a multi-dimensional measurement of magnetic resonance

Details Method for a multi-dimensional measurement of magnetic resonance Method for a multi-dimensional measurement of magnetic resonance

1990-07-03

1992-04-07

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

051031752

ABSTRACT:
A method is disclosed for a multi-dimensional measurement of magnetic resonance in defined small volume regions of solid-state samples. The samples are arranged in a uniform homogeneous magnetic field and, in a predetermined manner, irradiated with a sequence of high frequency pulses as well as exposed to a sequence of gradient magnetic field pulses. This is done in such a way that the spin magnetization to be measured is maintained for a time interval which is longer then the amount of time needed to switch-off the gradient magnetic field pulses. Initially, in a first time interval, the magnetization of a single slice only of the sample is transferred into a transverse magnetization tilted by 90.degree. with respect to the direction of the constant homogeneous magnetic field. Thereupon, in a second time interval, volume selective gradient magnetic field pulses are irradiated on the sample. In a subsequent third time interval, during the persistance of the volume selective gradient magnetic field pulses, high frequency pulses are irradiated on the sample, for transferring the transverse magnetization in the volume region to be measured into a multipole-state, said state being insensitive to the volume selective magnetic field pulses and persisting until after the point in time when these pulses are switched-off. Finally, in a subsequent fourth time interval, the multipole-state is transferred back again into a transverse magnetization and this magnetization is read-out as a signal.

REFERENCES:
patent: 4320342 (1982-03-01), Heinzerling
patent: 4535291 (1985-08-01), Lee et al.
patent: 4595899 (1986-06-01), Smith et al.
Journal of Magnetic Resonance 81, No. 2, Feb. 1, 1989, pp. 232-240, "Theoretical Treatment of Volume Selective NMR Spectroscopy (VOSY) Applied to Coupled Spin Systems", from R. Kimmich, E. Rommel and A. Knuttel.
Journal of Magnetic Resonance 83, No. 2, Jun. 15, 1989, pp. 299-308, "Slice Excitation and Localized NMR Spectroscopy on the Basis of Spin Locking", from E. Rommel and R. Kimmich.
Journal of Magnetic Resonance 86, No. 2, Feb. 1, 1990, pp. 264-272, "NMR Imaging of Solids by Jeener-Broekaert Phase Encoding", from E. Rommel, S. Hafner, and R. Kimmich.
Journal of Magnetic Resonance 66; Issue of 1986; pp. 530-535; Authors: G. C. Chingas; J. B. Miller and A. N. Garroway; Titel; NMR Images of Solids.
Physical Review, vol. 157, No. 2 of May 10, 1967; pp. 232-240; Authors: J. Jeener and P. Broekaert; Title: Thermodynamic Effects of a Pair of RF Pulses Nuclear Magnetic Resonance in Solids.

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