Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1986-07-22
1988-06-21
Levy, Stewart J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324322, G01R 3320
Patent
active
047527366
ABSTRACT:
A quadrature detection MRI radio frequency coil includes plural axially-extending conductive legs. At least two of the legs include breaks in conductivity at their mid-point with circumferentially extending inner-bridge conductors connected thereacross to which RF input/output feed connections are conveniently made so as to achieve a center fed coil structure, open at both ends. Other axially-extending legs may also include conductive breaks with capacitive coupling thereacross and circumferentially extending outer-bridges between the outer or distal ends of the legs may also include breaks in conductivity with capacitive coupling thereacross.
REFERENCES:
patent: 4638253 (1987-01-01), Jaskolski et al.
patent: 4649348 (1987-03-01), Flugan
patent: 4692705 (1987-09-01), Hayes
Journal of Magnetic Resonance 54, 324-327, 1983, "Quadrature Detection Coils-A Further .sqroot.2 Improvement in Sensitivity" by C. N. Chen, D. I. Hoult and V. J. Sank in Journal of Magnetic Resonance 54, 324-327 (1983).
"Quadrature Detection in the Laboratory Frame "by D. I. Hoult, C. N. Chen and V. J. Sank in Magnetic Resonance in Medicine I, 339-353 (1984).
"A Quadrature Probe for Adult Head NMR Imaging" by V. J. Sank, C. N. Chen and D. I. Hoult in Department of Radiology, Clinical Center Biomedical Engineering and Instrumentation Branch--pp. 650-651.
"Radio Frequency Penetration Effects in MR Imaging: Simulation/Experiment with Linearly Polarized and Circularly Polarized RF Fields" by G. H. Blover et al.--pp. 264-265.
"An in Vivo NMR Probe Circuits for Improved Sensitivity" by Joseph Murphy-Boesch and Alan P. Koretsky-Journal of Magnetic Resonance 54, 526-532 (1983).
Arakawa Mitsuaki
Crooks Lawrence E.
Harrison William H.
Fess Lawrence G.
Levy Stewart J.
The Regents of the University of California
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