Magnetic resonance imaging system and method

Details Magnetic resonance imaging system and method Magnetic resonance imaging system and method

1989-08-10

1990-11-13

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

049704656

ABSTRACT:
A magnetic resonance imaging system comprises a static field generating section, a gradient field applying section, a high-frequency pulse applying section, a sequence control section, a receiving section, and an imaging processing section. The sequence control section includes a first echo excitation section for sequentially applying a 90.degree. pulse and a 180.degree. pulse to the object, thereby generating a first magnetic resonance echo signal, a second echo excitation section for applying a 180.degree. pulse once again after the first magnetic resonance echo signal is generated, thereby generating a second magnetic resonance echo signal, and a compensating section for applying a gradient magnetic field to the object in accordance with a predetermined sequence pattern, between the first magnetic resonance echo signal and the second magnetic resonance echo signal, thereby causing the phase of a magnetic resonance echo signal corresponding to a specific moving atomic nucleus to match with the phase of a magnetic resonance echo signal corresponding to a specific static atomic nucleus at a time instance corresponding to a peak of the second echo signal.

REFERENCES:
patent: 4545384 (1985-10-01), Kawachi
patent: 4651097 (1987-03-01), Iwaoka et al.

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