Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1983-06-21
1985-10-22
Karlsen, Ernest F.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324314, G01R 3308
Patent
active
045491372
ABSTRACT:
Nuclear magnetic resonance diagnostic apparatus including means for applying a gradient magnetic field to form an equivalent plane in the magnetic field corresponding to the slice in the predetermined region to be measured for the acquisition of projection data, means for selectively saturating magnetization vectors in the entire region other than the region corresponding to the slice by applying radio frequency signal composed of continuous waves the frequency of which is successively varied in the range of the resonance frequency of the specified atomic nuclei and means for obtaining the projection data in the predetermined directions in the slice by measuring the resonance signals obtained by applying the 90.degree. pulses of resonance frequency of the specified atomic nuclei to the region to be measured while the saturation state of magnetization vectors is maintained.
REFERENCES:
patent: 4021726 (1977-05-01), Garroway et al.
patent: 4184110 (1980-01-01), Hinshaw
patent: 4422042 (1983-12-01), Sugimoto
patent: 4443761 (1984-04-01), Levitt
Garroway et al., "Image Formation in NMR by a Selective Irradiative Process," J. Phys., vol. 7, 1974.
Satoh Kozo
Suzuki Hirokazu
Karlsen Ernest F.
O'Shea Kevin D.
Tokyo Shibaura Denki Kabushiki Kaisha
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