Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1984-10-10
1987-07-21
Levy, Stewart J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324312, 324314, G01R 3320
Patent
active
046821120
ABSTRACT:
An antenna system for nuclear magnetic resonance (NMR) imaging or spectroscopy devices which produce a uniform magnetic field in an object under examination includes transmit and receive antenna arrays each comprising a group of loop antennas. A signal generating circuit produces a set of input antenna signals which are applied to the loop antennas of the transmit array which transmits RF signals of a frequency that perturbs the magnetic moment of nuclei in a volume of the object. The receiving antenna array is responsive to NMR signals produced by the relaxation of perturbed nuclei in said volume for producing a set of output antenna that are applied to a signal processing circuit. A control circuit selectively controls the relative phases and amplitudes of at least one set of antenna signals to control the size and location of the region of the volume in which excitation of nuclei occurs, or from which NMR signals are processed. The relative phases and amplitudes can be controlled in such a way that nuclei in only a preselected region of the volume are excited, and that NMR signals from nuclei in only a preselected region of the volume are processed.
REFERENCES:
patent: 3873909 (1975-03-01), Ernst
patent: 4291272 (1981-09-01), Hofer et al.
patent: 4468621 (1984-08-01), Hinshaw
patent: 4471305 (1984-09-01), Crooks et al.
patent: 4475084 (1984-10-01), Moore et al.
Turner, How to Use Grid-Dip Oscillators, 2nd Edition, 1969, pp. 69-78.
Elscint Ltd.
Levy Stewart J.
O'Shea Kevin D.
LandOfFree
NMR antenna and method for designing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with NMR antenna and method for designing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NMR antenna and method for designing the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-209503