Magnetic field enhancement component and magnetic field enhancement device

A magnetic field enhancing device applicable to an MRI system, characterized by comprising:

• a cylindrical supporting structure having two opposite and spaced ends comprising a third end and a fourth end;
• a plurality of magnetic field enhancing components arranged on the cylindrical supporting structure at intervals, each of the plurality of magnetic field enhancing components being configured to extend from the third end to the fourth end, and each of the plurality of magnetic field enhancing components comprising:
• a first dielectric layer comprising a first surface and a second surface opposite to each other;
• a first electrode layer arranged on the first surface;
• and
• a second electrode layer and a third electrode layer arranged on the second surface at an interval, wherein an orthographic projection of the first electrode layer projected onto the first dielectric layer overlaps with an orthographic projection of the second electrode layer projected onto the first dielectric layer;
• the first electrode layer, the first dielectric layer, and the second electrode layer form a second structural capacitor;
• the orthographic projection of the first electrode layer projected onto the first dielectric layer overlaps with an orthographic projection of the third electrode layer projected onto the first dielectric layer;
• and the first electrode layer, the first dielectric layer, and the third electrode layer form a third structural capacitor;
• a first annular conductive sheet arranged on the cylindrical supporting structure and proximate to the third end, and electrically connected to second electrode layers of the plurality of magnetic field enhancing components;
• and
• a second annular conductive sheet arranged on the cylindrical supporting structure and proximate to the fourth end, and electrically connected to third electrode layers of the plurality of magnetic field enhancing components;
• wherein the first annular conductive sheet comprises a control connecting opening;
• the control connecting opening is an opening of the first annular conductive sheet;
• the control connecting opening comprises a first connecting terminal and a second connecting terminal;
• each of the plurality of magnetic field enhancing components comprising a control circuit, comprising:
• a third capacitor, one terminal of the third capacitor being connected to the first connecting terminal, and another terminal of the third capacitor being connected to the second connecting terminal;
• a first inductor, one terminal of the first inductor being connected to the first connecting terminal;
• and
• a first switch circuit connected between another terminal of the first inductor and the second connecting terminal, wherein the first switch circuit is configured to be turned off in a radio frequency (RF) receiving period of the MRI system, the first switch circuit is further configured to be turned on in an RF transmitting period of the MRI system, so that the control circuit is in a high impedance state.

A magnetic field enhancing device applicable to a magnetic resonance imaging (MRI) system, characterized by comprising:

• a cylindrical supporting structure having two opposite and spaced ends comprising a third end and a fourth end;
• a plurality of magnetic field enhancing components arranged on the cylindrical supporting structure at intervals, each of the plurality of magnetic field enhancing components being configured to extend from the third end to the fourth end, and each of the plurality of magnetic field enhancing components comprising:
• a first dielectric layer comprising a first surface and a second surface opposite to each other, and a through hole being formed in the first dielectric layer;
• a first electrode layer and a third electrode layer arranged on the first surface at an interval;
• a second electrode layer arranged on the second surface and electrically connected to the first electrode layer through conductive material filled in the through hole;
• an orthographic projection of the first electrode layer projected onto the first dielectric layer overlaps with an orthographic projection of the second electrode layer projected onto the first dielectric layer;
• the first electrode layer, the first dielectric layer, and the second electrode layer form a first structural capacitor;
• a first annular conductive sheet arranged on the cylindrical supporting structure and proximate to the third end, and electrically connected to one end, away from the third electrode layers, of the first electrode layers of each of the plurality of magnetic field enhancing components;
• and
• a second annular conductive sheet arranged on the cylindrical supporting structure and proximate to the fourth end, and electrically connected to one end, away from the first electrode layer, of the third electrode layer of each of the plurality of magnetic field enhancing components.