Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1990-10-31
1993-03-23
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324318, G01R 3320
Patent
active
051967979
ABSTRACT:
In the present invention a method is disclosed to correct the asymmetry in an NMR radio frequency coil of the type that has a pair of conductive loop elements disposed in a spaced apart relation along a common longitudinal axis. The coil has at least eight conductive elements electrically interconnecting the loop elements at point spaced along the periphery of each of the loops. A pair of corrective capacitive elements are placed 45.degree. apart from one another and in series with a pair of the conductive segments which interconnect the loops. The present invention also relates to an NMR radio frequency coil having N-fold symmetry and reduced eddy current.
REFERENCES:
patent: 4439733 (1984-03-01), Hinshaw et al.
patent: 4638253 (1987-01-01), Jaskolski et al.
patent: 4680548 (1987-07-01), Edelstein et al.
patent: 4692705 (1987-09-01), Hayes
patent: 4694255 (1987-09-01), Hayes
patent: 4820985 (1989-04-01), Eash
patent: 4833409 (1989-05-01), Eash
patent: 4916418 (1990-04-01), Rath
J. Magn. Reson., 63, pp. 622-628 (1985), "An Efficient, Highly Homogeneous RF Coil for Whole-Body NMR Imaging at 1.5 T", C. E. Hayes, W. A. Edelstein, J. F. Schenck, O. M. Mueller, M. Eash.
J. Magn. Reson., 82, pp. 51-62 (1989), "The Theory of the Bird-Cage Resonator", J. Tropp.
IEEE Trans. on Medical Imaging, vol. 8, No. 3, Sep. 1989, pp. 286-294, "A Technique for Double Resonant Operation of Birdcage Imaging Coils", P. M. Joseph, D. Lu.
Proc. of the Soc. of Magn. Reson. in Medicine, 8th Annual Meeting, Amsterdam, 1989, p. 945, "Theory and Implementation of the Quadrature Driven Low Pass Birdcage Resonator", D. A. C. Kelly, J. Murphy-Boesch, D. Vigneron, T. R. Brown.
Proc. of the Soc. of Magn. Reson. in Medicine, 9th Annual Meeting, New York, 1990, p. 506, "The Loss of Signal to Noise in Quadrature Reception Due to Imperfect Isolation Between Channels: Comparison of Theory, Experiment, and Simulation", J. Tropp, D. Derby.
J. Mag. Reson., 86, pp. 488-495, 1990, "Design and Performance of a Double-Tuned Bird-Cage Coil", A. R. Rath.
Soc. of Magn. Reson. in Medicine, 7th Ann. Meeting, San Francisco, Aug. 22-26, 1988, "The Theory and Practice of the Driven Bird Cage Coil Neglecting the Effects of Broken Symmetry", J. Tropp.
Soc. of Magn. Reson. in Medicine, 8th Ann. Meeting, Amsterdam, Aug. 12-18, 1989, "The Theory of Imperfect, Quatrature-Tuned, Low Pass Bird Cage Resonator", J. Tropp.
Soc. of Magn. Reson. in Medicine, 7th Ann. Meeting, San Francisco, Aug. 22-26, 1988, "The Theory of Broken Symmetry in the Low Pass Bird Cage Resonator" J. Tropp.
Mah Raymond Y.
Tokar Michael J.
Toshiba America MRI Inc.
LandOfFree
Method of correcting an asymmetry in an NMR radio frequency coil does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of correcting an asymmetry in an NMR radio frequency coil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of correcting an asymmetry in an NMR radio frequency coil will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1354952