Patent ID: 8648597

Claim:
An antenna system compatible with a magnetic resonance imaging apparatus and configured for transmission and/or reception of a signal, comprising: a cylindrical conductive element which is hollow; a plurality of strip-shaped conductive elements; one or more dielectric substances, having a relative dielectric constant not lower than 1, and that are disposed between the strip-shaped conductive elements and the cylindrical conductive element; a plurality of capacitors connecting each of the plural strip-shaped conductive elements with the cylindrical conductive element; and a first connecting line connecting with a transceiver which transmits and/or receives the signal, wherein: the plural strip-shaped conductive elements each maintain a certain distance from an internal surface of the cylindrical conductive element, are disposed in an interior of the cylindrical conductive element in parallel to a center axis of the cylindrical conductive element in order to form a loop with the cylindrical conductive element, and are axisymmetrically disposed with respect to the center axis of the cylindrical conductive element along a circumference of the cylindrical conductive element, the capacitors are set so that the loop resonates at a frequency of the signal, the first connecting line is provided at both ends of one of the capacitors connected to a predetermined strip-shaped conductive element of the plural strip-shaped conductive elements, adjacent ones of the strip-shaped conductive elements, in a cross-section view taken along a plane extending through each of the strip-shaped conductive elements, are disposed at intervals in a circumferential direction of the cylindrical conductive element, and at least two of said intervals in the circumferential direction are different from each other.