Method for reducing artifacts in magnetic resonance imaging

Details Method for reducing artifacts in magnetic resonance imaging Method for reducing artifacts in magnetic resonance imaging

1993-12-03

1996-07-23

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324306, G01V 300

Patent

active

055393110

ABSTRACT:
In magnetic resonance imaging, a first echo train is obtained by applying a readout gradient magnetic field to a region of interest to be imaged and periodically inverting the polarity of the readout gradient magnetic field, without applying an encoding gradient magnetic field to the region of interest. A periodic change of phase shift of the first echo train is detected from the first echo train. Information indicating phase shifts of all of the echoes in the first echo train is obtained using the periodic change of phase shift. A second echo train is obtained by applying a readout gradient magnetic field and an encoding magnetic field to the region of interest and periodically inverting the polarity of the readout gradient magnetic field. Phases of echoes in the second echo train are corrected using the information indicating phase shifts of all of the echoes in the first echo train.

REFERENCES:
patent: 5151656 (1992-09-01), Maier et al.
patent: 5184073 (1993-02-01), Takeuchi et al.
patent: 5221898 (1993-06-01), Takiguchi et al.

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