System for magnetic resonance imaging

Details System for magnetic resonance imaging System for magnetic resonance imaging

1994-10-03

1997-10-14

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324309, G01V 300

Patent

active

056776268

ABSTRACT:
A system for magnetic resonance imaging is provided in which a prepulse is first applied to an object being examined placed in a static magnetic field for suppressing an MR signal from fat of the object. Then a pulse sequence including an RF pulse for multi-slice imaging of a plurality of slicing planes is applied to the object for acquiring image data. The system comprises an element for performing a shimming increasing uniformity of the static magnetic field, an element for detecting, every one of the slicing planes, an offset value offsetting a frequency shift of a spectrum distribution caused by turbulence in higher-order components of the static magnetic field, and an element for correcting, every one of the slicing planes, a frequency range of the prepulse in accordance with the offset value detected. The correcting element corrects a frequency of the RF pulse in compliance with the detected offset value.

REFERENCES:
patent: 5050609 (1991-09-01), Balaban et al.
patent: 5111143 (1992-05-01), McKinnon et al.
patent: 5121059 (1992-06-01), Wieland
patent: 5420510 (1995-05-01), Fairbanks et al.

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