Phase correcting method in a magnetic resonance imaging system a

Details Phase correcting method in a magnetic resonance imaging system a Phase correcting method in a magnetic resonance imaging system a

1988-07-29

1990-02-20

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

049029746

ABSTRACT:
A magnetic resonance imaging method and a device for realizing the same for obtaining a magnetic resonance image having corrected phases, wherein the device comprises a construction for generating a static magnetic field, gradient magnetic fields and a radio-frequency magnetic field, irradiating an object to be tested with these magnetic fields and detecting nuclear magnetic resonance signals coming from the object to be tested; a sequence-controlling portion controlling the irradiation of the object to be tested with the gradient magnetic fields and the radio-frequency magnetic field and the detection of the nuclear magnetic resonance signals; and a processing device for reconstructing complex image data on the basis of the nuclear magnetic resonance signals thus detected. This processing device removes noise components by making complex image data signals pass through a low frequency filter after forming the even-number-th power thereof; assumes the phase distortions of the complex image data; corrects the complex image data on the basis of assumption results thus obtained; and synthesizing and displaying the magnetic resonance image on the basis of the corrected complex image data.

REFERENCES:
patent: 4661775 (1987-04-01), Kormos et al.
patent: 4720679 (1988-01-01), Patrick et al.
Ahn et al., "A New Phase Correction Method . . . Analysis", IEEE Transactions on Medical Imaging, Mar. 1987.
Borrello et al., "Chemical Shift-Based . . . Images", Radiology, Aug. 1987.
Morishita et al., "Shingo Shori (Signal Processing)", 1987, pp. 160-165.

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