Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2008-02-26
2009-12-29
Shrivastav, Brij B (Department: 2831)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S322000
Reexamination Certificate
active
07639012
ABSTRACT:
There is provided an RF coil capable of resonating or tuning two frequencies, having uniform spatial sensitivity and having a small spatially occupied volume, especially an RF coil suitable for a high magnetic field MRI apparatus. A coil apparatus is made up of a plurality of linear conductors200, 201arranged around a central axis and two ring conductors202, 203connected to the respective ends of the plurality of linear conductors200, 201and capacitors are inserted in the linear conductors200, 201and ring conductors202, 203. The plurality of linear conductors are made up of conductors200located near the central axis and conductors201located far from the central axis and the ring conductors202, 203have star-like polygonal shape so that the linear conductors are arranged alternately. This structure can realize two tuning modes; a resonance mode similar to a birdcage type resonance mode and a resonance mode which becomes zero (node) in the vicinity of the linear conductor group200located near the central axis.
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Bito Yoshitaka
Habara Hideta
Ochi Hisaaki
Soutome Yoshihisa
A. Marquez, Esq. Juan Carlos
Hitachi , Ltd.
Shrivastav Brij B
Stites & Harbison PLLC
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