Resonator for a magnetic resonance imaging apparatus

Details Resonator for a magnetic resonance imaging apparatus Resonator for a magnetic resonance imaging apparatus

1990-12-06

1992-07-07

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

343743, G01R 3320

Patent

active

051286157

ABSTRACT:
A resonator for use in a magnetic resonance imaging apparatus for transmitting and receiving high frequency signals is formed by a combination of two antenna sub-systems, which generate respective magnetic fields which are perpendicular to each other, with the currents in the sub-system being phase-shifted by 90.degree. relative to each other, and each sub-system includes a capacitance which defines the resonant frequency. Each of the sub-systems forms a current loop, the current loops containing a common current network and a common base plate, which serves as a return path for both current loops. The junctions of the current network are connected via the resonant capacitances to the base plate, which consists of electrically conductive material. A circularly polarizing resonator is achieved for the transversal, fundamental field of the imaging apparatus, with the resonator also being capable of use as a surface resonator if the spacing between the current network and the base plate is small.

REFERENCES:
patent: 4065121 (1991-11-01), Ghadaksaz
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patent: 5057778 (1991-10-01), Rath
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