Magnetic resonance imaging apparatus with spirally extended monopole antenna structure
Disclosed is a magnetic resonance imaging (MRI) apparatus with a spirally extended monopole antenna structure whereby magnetic field homogeneity is improved. The apparatus includes: a cylinder body 110 ; a plurality of monopole antennas forming an array, the antenna being spirally arranged along a surface of the cylinder body 110 at a predetermined inclination angle relative to a central axis of the cylinder body 110 ; a ground plate 130 in which ends of the monopole antennas are arranged on one surface of the ground plate 130 in a circular arrangement; and a plurality of coaxial cables 140 in which signal lines thereof are respectively connected to the monopole antennas and ground lines thereof are connected to the ground plate 130.
1. A magnetic resonance imaging (MM) apparatus with a spirally extended monopole antenna structure, the apparatus comprising:
a cylinder body;
a plurality of monopole antennas forming an array, the antennas spirally arranged along a surface of the cylinder body at a predetermined inclination angle relative to a central axis of the cylinder body;
a ground plate in which ends of the monopole antennas are arranged on one surface of the ground plate in a circular arrangement;
a plurality of coaxial cables in which signal lines thereof are respectively connected to the monopole antennas and ground lines thereof are connected to the ground plate; and
conductive shielding members disposed between the monopole antennas.
2. The apparatus of claim 1 , wherein each of the shielding members is a conductive strip arranged to be perpendicular to the cylinder body.
3. The apparatus of claim 1 , wherein the shielding members are spirally arranged along the surface of the cylinder body at the same angle as the monopole antennas.
4. The apparatus of claim 2 , wherein the shielding members are spirally arranged along the surface of the cylinder body at the same angle as the monopole antennas.