Wave transmission lines and networks – Resonators
Patent
1984-08-30
1986-06-10
Nussbaum, Marvin L.
Wave transmission lines and networks
Resonators
324307, 324318, 333223, 333235, H01P 700, H01P 512
Patent
active
045945667
ABSTRACT:
A radio frequency (rf) coil for an NMR device is disclosed in which at least two active sections each have a ground end connected to a common potential and a drive end opposite the ground end. The rf coil also includes at least one transmission line section for coupling the drive ends of two of the active sections. The coil is tuned to a resonant frequency by a variable capacitor connected to the drive end of one of the active sections. Two active sections may be arranged opposite each other about an axis and connected by a half wavelength transmission line to provide a linearly polarized magnetic field. Four active sections may be arranged 90.degree. apart from each other in a quadrature coil to provide a circularly polarized magnetic field. Each active section may include two wires, each connected at one end to a lower ground ring and having an opposite end adjacent an upper ground ring which provides a ground plane. The lower ground ring may have indentations for fitting around a human subject's shoulders, and inner and outer Faraday shields may have openings forming a view port through the coil.
REFERENCES:
patent: 3771055 (1973-11-01), Anderson
patent: 4095168 (1978-06-01), Hlavka
patent: 4284948 (1981-08-01), Young
patent: 4340862 (1982-07-01), Percival et al.
patent: 4361807 (1982-11-01), Burl et al.
patent: 4362933 (1982-12-01), Young et al.
patent: 4388601 (1983-06-01), Sneed, Jr. et al.
patent: 4439733 (1984-03-01), Hinshaw et al.
patent: 4443760 (1984-04-01), Edelstein et al.
patent: 4467282 (1984-08-01), Siebold
patent: 4506224 (1985-03-01), Krause
D. I. Holt et al, "The Signal-to-Noise Ratio . . . ", Journal of Magnetic Resonance, vol. 24 (1976), pp. 71-85.
H. J. Schneider et al, "Slotted Tube Resonator . . . ", Review of Scientific Instruments, vol. 48, No. 1 (Jan. 1977), pp. 68-73.
D. W. Alderman et al, "An Efficient Decoupler Coil Design . . . ", Journal of Magnetic Resonance, vol. 36 (1979), pp. 447-451.
A. Leroy-Willig et al, (single sheet poster), presented at the Second Annual Meeting of the Society of Magnetic Resonance in Medicine, Aug. 16-19, 1983 in San Francisco.
A. Leroy-Willig et al., "The Slotted Cylinder . . . ", The Society of Magnetic Resonance in Medicine, Second Annual Meeting, Aug. 16-19, 1983, San Francisco, pp. 213-214.
I. J. Lowe et al, "A Fast Recovery Pulsed . . . ", Rev. Sci. Instrum., vol. 45, No. 5 (May 1974), pp. 631-639.
I. J. Lowe et al, "Homogeneous rf Field Delay . . . ", Rev. Sci. Instrum., vol. 48, No. 3 (Mar. 1977), pp. 268-274.
D. M. Ginsberg et al, "Optimum Geometry of Saddle . . . ", The Review of Scientific Instruments, vol. 41, No. 1 (Jan. 1970), pp. 122-123.
D. I. Holt et al, "Quadrature Detection . . . ", Magnetic Resonance in Medicine (1984), pp. 339-353.
C. N. Chen et al, "Quadrature Detection Coils . . . ", Journal of Magnetic Resonance, vol. 54 (1983), pp. 324-327.
H. Bomsdorf et al, "First NMR Head Images . . . ", Proc. of Soc. of Magnetic Resonance in Medicine, (3rd Annual Mtg., Aug. 13-17, 1984, New York), pp. 61-62.
P. Roschmann, "Ringresonator RF-Probes . . . ", Proc. of Soc. of Magnetic Resonance in Medicine, (3rd Annual Mtg., Aug. 13-17, 1984, New York), pp. 634-635.
Advanced NMR Systems, Inc.
Nussbaum Marvin L.
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