Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1997-11-24
2000-02-22
Smith, Ruth S.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
324318, 324322, A61B 5055
Patent
active
06029082&
ABSTRACT:
A less-claustrophobic, quadrature, radio-frequency head coil (42) includes first and second broken end rings (90, 92) connected to each other in parallel by a plurality of leg conductors (94). At least two of the leg conductors are interconnected by a third arcuate conductor segment (98) axially displaced from planes of the first and second end rings to provide an opening (44) over a subject's face. The opening reduces patient claustrophobia and permits access to the patient for life-support devices or the practice of interventional medicine. The end rings have a fixed capacitance (C.sub.1, C.sub.2) between each pair of leg conductors. The fixed capacitance C.sub.1 between at least one pair of leg conductors and the fixed capacitance C.sub.2 between at least the pair of leg conductors adjacent the opening, where C.sub.2 >C.sub.1. A two-port feed (66, 68) circumferentially attached to the coil generally opposite the opening matches the individual linear modes. Thus, the radio frequency coil is able to maintain two preferred principal linear modes (A, B) across the open area of the coil.
REFERENCES:
patent: 4692705 (1987-09-01), Hayes
patent: 4769605 (1988-09-01), Fox et al.
patent: 5212450 (1993-05-01), Murphy-Boesch et al.
patent: 5277183 (1994-01-01), Vij
patent: 5315251 (1994-05-01), Derby et al.
patent: 5519321 (1996-05-01), Hagen et al.
patent: 5602479 (1997-02-01), Srinivasan et al.
patent: 5619996 (1997-04-01), Beresten
patent: 5663646 (1997-09-01), Kuth et al.
patent: 5664568 (1997-09-01), Srinivasan et al.
"Quadrature Detection in the Laboratory Frame." Hoult, et al., Magnetic Resonance in Medicine, v. 1, 339-353 (1984).
"A Quadrature Coil for the Adult Human Head." Sank, et al., Journal of Mafnetic Resonance, v. 69, 236-242 (1986).
"A Quadrature 5x5 Mesh Dome Resonator for Head Imaging and Spectroscopy." Meyer, et al., SMR 2nd Meeting, San Francisco, Book of Abstracts, 217 (1994).
"An Endcap Birdcage Resonator for Quadrature Head Imaging." Hayes, SMRM 5th Annual Meeting, Montreal, Book of Abstracts, Works in Progress, 39-40 (1986).
"A Volume Optimized Elliptical Endcap Brain Coil." Wong, et al., SMRM 11th Annual Meeting, Berlin, Book of Abstracts, 4015 (1992).
"A Mulltiple-Frequency Coil with a Highly Uniform B.sub.1 Field." Bollinger, et al., Journal of Magnetic Resonance, v. 81, 162-166 (1988).
"Quadrature-Headcoil and Helmholtz-Type Neckcoil--an Optimized RF Antenna-Pair for Imaging Head, Neck and C-Spine at 1.0T and 1.5T." Krause, et al., SMRM 7th Annual Meeting, San Francisco, Book of Abstracts, 845 (1988).
"Evaluation of a `True` Dome Quadrature Head Coil for Functional Imaging." Srinivasan, et al., SMR, 3rd Scientific Meeting, Nice, France, Book of Abstracts, 973 (1995).
"A B.sub.1 Optimized, Hybrid-Quadrature Dome Resonator for Head Imaging." Srinivasan, et al, SMR, 3rd Scientific Meeting, Nice, France, Book of Abstracts, 972 (1995).
"A Hybrid Birdcage Coil Design for Improved Sensitivity and Homogeneity in Head Imaging and Spectroscopy." Meyer, et al., SMRM 12th Annual Meeting, New York, Book of Abstracts, 217 (1994).
"A User-Friendly, `Open-Faced` Head Coil for MRI at 1.5T." Srinivasan, et al., SMR 4th Scientific Meeting, New York, Book of Abstracts (1996).
Elek Robert A.
Liu Haiying
Srinivasan Ravi
Picker International Inc.
Smith Ruth S.
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