Title:
【発明の名称】磁気共鳴イメージング装置
Document Type and Number:
Japanese Patent JP2607638
Kind Code:
B2
Abstract:
A detuning/decoupling arrangement for a Magnetic Resonance Imaging (MRI) system RF coil arrangement (of the typing using the nuclear magnetic resonance, or NMR, phenomenon) uses switching diodes to selectively connect and disconnect portions of an RF resonant circuit in response to a DC control signal. The DC control signal selectively forward biases and reverse biases the switching diodes. The DC control current is fed to the resonant circuit along the same RF transmission line used to feed RF signals to/from the circuit. An in-line coaxial shielded RF choke connected to the RF transmission line isolates the DC control signals from the RF signals flowing on the same transmission line -- reducing the number and complexity of isolation devices required on the ends of the transmission line to separate the RF and DC signals.
Inventors:
Mitsuaki Arakawa
Lawrence E. Crooks
Lawrence E. Crooks
Application Number:
JP22553288A
Publication Date:
May 07, 1997
Filing Date:
September 08, 1988
Export Citation:
Assignee:
The Regents of the University of California
International Classes:
A61B5/055; G01R33/32; A61B10/00; G01R33/36; (IPC1-7): A61B5/055; G01R33/36
Domestic Patent References:
| JP6272343A |
Other References:
【文献】米国特許4682125(US,A)
【文献】国際公開87/921(WO,A)
【文献】国際公開87/921(WO,A)
Attorney, Agent or Firm:
Shoichi Hase (1 person outside)