Method for measuring the time dependence of the field gradient i

Details Method for measuring the time dependence of the field gradient i Method for measuring the time dependence of the field gradient i

1986-12-29

1988-06-21

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324312, G01R 3320

Patent

active

047527358

ABSTRACT:
Method for measuring the time dependence of an oscillating field gradient and representatively its integral function with respect to time for imaging method using the field gradient such as rapid chemical shift imaging method echo planar method, etc. A uniform specimen is placed within a coil of an NMR device, in which nuclear spins are excited; a phase encoding field gradient is applied thereto; and signals are sampled under application of the field gradient to be measured. These steps are repeated and an integral function of the field gradient with respect to time is obtained by using the peak position in the series of data obtained by this repetition.

REFERENCES:
patent: 4644276 (1987-02-01), Sierocuk et al.
patent: 4654595 (1987-03-01), Sepponen
Sekihara et al., "A New Method of Measuring Static Field Distribution Using Modified Fourier NMR Imaging", J. Phys. E.: Sci. Instruments, vol. 18, pp. 224-227, 1985.
Mansfield et al., "Biological and Medical Imaging by NMR", J. Magn. Res., 29, 355-373, 1978.
Frahm et al., "Signal Restoration . . . Gradients", J. Phys. E: Sci. Instrum., vol. 17, pp. 612-616, 1984.
Tropper, "Image Reconstruction . . . Acquisition", J. Magn. Res., 42, 193-202, 1981.
Feiner et al., "On NMR . . . Modulation", Appl. Phys., 22, 257-271, 1980.

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