Magnetic resonance imaging (MRI) apparatus employing optimum pre

Details Magnetic resonance imaging (MRI) apparatus employing optimum pre Magnetic resonance imaging (MRI) apparatus employing optimum pre

1994-04-05

1996-02-27

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324322, G01V 300

Patent

active

054951720

ABSTRACT:
A magnetic resonance imaging apparatus capable of freely performing the presaturation in a wide-range region over the excited region of the transmiteceive coil and also capable of sufficiently suppressing the blood-flow artifact and the motion artifact to a minimum. The magnetic resonance imaging (MRI) apparatus includes: a static magnetic field generating unit; a gradient magnetic field generating unit where the gradient magnetic field is overlapped to the static magnetic field; a sequencer for executing a desired pulse sequence, in which the pulse sequence includes a main sequence that detects a magnetic resonance signal, and a pre-saturation sequence that saturates magnetization in a biological body under medical examination, prior to execution of the main sequence; first radiofrequency (RF) coil for transmitting a high frequency magnetic field to the biological body according to the main sequence; and second (RF) coil for transmitting a high frequency magnetic field to perform pre-saturation according to the presaturation sequence.

REFERENCES:
patent: 5348012 (1994-09-01), Kojima
"Cylindrical Cross-Coil NMR Limb Blood Flowmeter" by R. E . Halbach et al. Rev. Sci. Instum. 50(4) Apr. 1979 pp., 428-434.

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