Title:
RF COIL DEVICE FOR MAGNETIC RESONANCE DEVICE
Document Type and Number:
Japanese Patent JP2804907
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an efficient RF coil device for magnetic resonance device by connecting a balance-unbalance conversion circuit corresponding to at least one resonance frequency which a multiple tuning RF coil has in a power feed part and reducing, loss and deterioration, etc.
SOLUTION: A balance-unbalance conversion circuit 2 comprising inductance element L and a capacitance element C is provided between a coaxial line 4 and a multiplex tuning RF coil 1. A relationship of ω2LC=1 is established for the elements L and C, where ω is the resonance frequency of the nuclides of a balanceunbalance conversion circuit. An impedance Z1 of a circuit which is comprised of the elements L and C is found to be equal to ωL/(ω2LC-1). By substituting the conditions in the previous expression for the expression, it is found that Z1=∞ and the current does not flow to a coating conductor, and hence preventing discharge loss from occurring by the circuit 2.
Inventors:
Yoshikawa Miya
Kazuya Okamoto
Kazuya Okamoto
Application Number:
JP23526995A
Publication Date:
September 30, 1998
Filing Date:
September 13, 1995
Export Citation:
Assignee:
Medical Research Welfare Equipment Research Institute
International Classes:
G01R33/36; (IPC1-7): G01R33/36
Domestic Patent References:
| JP4200443A | ||||
| JP2280735A | ||||
| JP351173B2 |
Attorney, Agent or Firm:
Takehiko Suzue
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