Transmitting and/or Receiving MRI Signals for a MRI Examination

摘要

An arrangement includes a superconducting split ring resonator, a cryostat, and a copper coil. The resonator is arranged in the cryostat and includes at least one ring-shaped conductor made of a superconducting material and including an opening and a taper. The copper coil may be used to transmit a MRI excitation signal. This signal causes a current to be induced in the conductor that leads to the breakdown of the superconductivity. The conductor is detuned and therefore no longer develops an interfering effect. It is possible for the effect of the breakdown of superconductivity to be used for detuning in a targeted manner. After the transmission is complete, the conductor returns into the superconducting state and acts as a superconducting reception antenna for the MRI measurement signal. The copper coil is inductively coupled to the conductor and configured to read out the signal induced in the conductor.

主权项

1. An arrangement for transmitting, receiving, or transmitting and receiving MRI signals for examining an object, the arrangement comprising:
a superconducting split ring resonator configured to receive a MRI measurement signal from the object to be examined, the split ring resonator comprising at least a first ring-shaped interrupted conductor made of a superconducting material, wherein the first conductor comprises a first opening and a first taper; a cryostat configured to generate predeterminable ambient conditions in a cavity, wherein the split ring resonator is arranged in the cavity and wherein the ambient conditions are predeterminable in such a way for the first conductor to be put into a superconducting state, and a conventional coil configured to transmit a MRI excitation signal, read out the MRI measurement signal received by the split ring resonator, or transmit the MRI excitation signal and read out the MRI measurement signal received by the split ring resonator, wherein the conventional coil is arranged outside of the cryostat and is inductively coupled to the split ring resonator.