Magnetic resonance imaging apparatus having a detuned RF coil
AssigneeU.S. Philips Corporation
InventorTeunis R. Van Heelsbergen
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Abstract
In magnetic resonance imaging apparatus in which bird-cage coils are used in combination with other coils, a capacitance is bridged by means of an inductive element. Substantial detuning and hence adequate uncoupling of the bird-cage coil from the other (receiving) coil is achieved. Use can be made of the already present coaxial transmission line via which the RF energy is applied to the bird-cage coil. Connecting the core and the jacket of the coaxial transmission line there is arranged a diode switch so that the bird-cage coil circuit can be electronically detuned, thus enabling fast switching on and off of the bird-cage coil.
Claims8
In a magnetic resonance imaging apparatus having first coil means for generating RF fields and second coil means for detecting magnetic resonance signals, said first coil means having a series connection of a plurality of coils and a plurality of capacitors, means for decoupling said first coil means from said second coil means comprising an inductive element connected through an electronic switch to bridge one of said capacitors.
Dependencies are inferred from the claim text.