Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1987-03-30
1988-05-24
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324307, G01R 3320
Patent
active
047468602
ABSTRACT:
In a magnetic resonance imaging system, a radio frequency field for exciting a magnetic resonance phenomenon, a first gradient field for determining a image slice, a second gradient field for phase-encoding, and a third gradient field for reading out an echo signal of the magnetic resonance, are applied to a subject in the static field. Thus, the echo signal is acquired, and image reconstruction data is obtained from the echo signal, whereby reconstructed image information is obtained. A correction data generating section uses the second gradient field as a gradient field for reading out the echo signal, and applies the first and second gradient fields, and the radio frequency field to the subject in the static field, in accordance with a predetermined sequence, without applying a gradient field for phase-encoding, and acquires the echo signal, so as to obtain correction data corresponding to the image reconstruction data along an encoding axis. A correcting section corrects the image reconstruction data, using the correction data.
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(4th SMRM Preprint P. 948) Breather, A Method for Passive Reduction of Respiratory Motion-Induced "Ghost" Artifacts in MR Imaging Using Breathing Synchronization (U.S.P. No. 4,567,893).
(4th SMRM Preprint P. 939) Respiratory Ordered Phase Encoding (ROPE) (United Kingdom Patent Application No. 8,417,290).
Kabushiki Kaisha Toshiba
Tokar Michael J.
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