Magnetic resonance imaging method and apparatus

Details Magnetic resonance imaging method and apparatus Magnetic resonance imaging method and apparatus

1995-04-10

1996-12-24

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324309, G01V 300

Patent

active

055876560

ABSTRACT:
A method of determining a magnetic resonance (MR) distribution in a part of a body uses an arrangement of multiple surface coils. According to the method, component distributions are determined using separate ones of the surface coils and the component distributions are combined to form the MR distribution. This is done by first combining the component distributions to form a distribution I.sub.hom which is optimized with respect to homogeneity and a distribution I.sub.snr which is optimized with respect to signal-to-noise ratio (SNR). Then the distributions I.sub.hom and I.sub.snr are combined to form the MR distribution, preferably by determining a smoothed ratio of the distributions I.sub.hom and I.sub.snr and using that ratio to correct I.sub.snr for homogeneity. Also an apparatus to perform the method is disclosed.

REFERENCES:
patent: 4463375 (1984-07-01), Macovski
patent: 4825162 (1989-04-01), Roemer et al.
patent: 4827528 (1989-05-01), Macovski
patent: 5243288 (1993-09-01), Mori
patent: 5280246 (1994-01-01), Takahashi et al.
"The NMR Phased Array" P. B. Roemer et al, Magnetic Resonance In Medicine, 16 pp. 192-225 (1990).
SMRM 1987, Abstract 266.
SMRM 1991, Abstract 744.

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