MR coil
An MR coil is provided including at least one antenna element. The antenna element has at least one expandable conductor section with a plastic cover and a core including conductive fluid.
1. A magnetic resonance (MR) coil, comprising:
at least one antenna element, wherein the at least one antenna element comprises an expandable conductor section and an additional expandable conductor section, wherein the expandable conductor section comprises a plastic cover; and
a core comprising a conductive fluid,
wherein the at least one antenna element and the additional expandable conductor section are each configured to have a varying resistance during expansion.
2. The MR coil of claim 1 , wherein the conductive fluid is a metallic fluid.
3. The MR coil of claim 1 , wherein the conductive fluid is a non-magnetic fluid.
4. The MR coil of claim 2 , wherein the metallic fluid comprises a GA—In alloy.
5. The MR coil of claim 4 , wherein a reflection factor of the at least one antenna element is set to a range between 40% and 60%.
6. The MR coil of claim 2 , wherein the conductive fluid is a non-magnetic fluid.
7. The MR coil of claim 2 , wherein the metallic fluid consists of a Ga—In alloy.
8. The MR coil of claim 2 , wherein a reflection factor of the at least one antenna element is set to a range between 40% and 60%.
9. The MR coil of claim 3 , wherein a reflection factor of the at least one antenna element is set to a range between 40% and 60%.
10. The MR coil of claim 1 , wherein the additional expandable conductor section has a wave-like characteristic.
11. The MR coil of claim 10 , wherein the additional expandable conductor section comprises a plastic incorporating electrically conductive powders.
12. The MR coil of claim 1 , wherein the additional expandable conductor section comprises a plastic incorporating electrically conductive powders.
13. The MR coil of claim 1 , wherein a direct current is applied to the additional expandable conductor section, and
wherein a control voltage is generated from a current change via a differential amplifier.
14. The MR coil of 13 , further comprising:
a capacitance diode switched in parallel to a fixed frequency-determining capacitor of a matching network,
wherein the capacitance diode is controlled via the control voltage to compensate for any frequency change caused by expansion.
15. A magnetic resonance (MR) coil, comprising:
at least one antenna element, wherein the at least one antenna element comprises at least one expandable conductor section, wherein the at least one expandable conductor section comprises a plastic cover; and
a core comprising a conductive fluid,
wherein a reflection factor of the at least one antenna element is set to a range between 40% and 60%.
16. The MR coil of claim 15 , further comprising:
at least one additional expandable conductor section,
wherein the at least one antenna element and the at least one additional expandable conductor section are each configured to have a varying resistance during expansion.