Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1991-03-12
1992-11-03
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324318, G01R 3320
Patent
active
051608901
ABSTRACT:
A dielectric resonator is used in a magnetic resonance examination apparatus comprising a magnet system (31, 32) for generating a steady magnetic field in an examination space (2), a transmitter device (12, 13, 18, 28) for generating an RF field to be superposed on the steady magnetic field in an object (30) to be examined, a device for producing a resonance step-up of the RF field active in the object (30) to be examined, and a device for detecting magnetic resonance signals generated in the object (30) to be examined. Stronger B.sub.1 fields are created by at least one dielectric resonator (1, 5, 10, 16, 17, 20, 21) which neighbors the object (24) to be examined and which comprises a dielectric having a relative dielectric constant .epsilon..sub.r >20, the dimensions of the resonator being chosen so that therein, using a neighboring transmitter device, (12, 13, 18) there can be generated at least one resonant mode with a frequency which is in the vicinity of the Larmor frequencies to be detected of the nuclei to be excited in the object (24) to be examined, for example, protons.
REFERENCES:
patent: 4631480 (1986-12-01), Young
patent: 4633180 (1986-12-01), Biehl et al.
patent: 4685468 (1987-08-01), Macovski
patent: 4740751 (1988-04-01), Misic et al.
patent: 5024229 (1991-06-01), Bryant et al.
Society of Magnetic Resonance in Medicine, Seventh Annual Meeting & Exhibition, Aug. 20-26, 1988, San Francisco, Calif., p. 267.
D. Kajfez et al., "Computed Modal Field Distributions for Isolated Dielectric Resonators", IEEE Transaction on Microwave Theory and Techniques, vol. MTT-32, No. 12, Dec. 1984, pp. 1609-1616.
Mah Raymond Y.
Slobod Jack D.
Tokar Michael J.
U.S. Philips Corp.
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