MAGNETIC RESONANCE IMAGING APPARATUS AND ANTENNA DEVICE

摘要

In order to provide a technique in which, in the TEM type antenna, the uniformity of sensitivity in the internal portion of the antenna can be maintained with simple configuration, without scarifying the internal space of the antenna, regardless of a size, a shape and a location of a load, and also regardless of locations of the constitutional members of the antenna, the TEM type antenna includes rung conductors which branch out into plural pieces in the middle portion and join into one piece in the two end portions. In other words, the rung conductor having a void space in the middle portion of the rung conductor in the longitudinal direction is provided. The adjacent rung conductors are disposed to be further closer to each other in the middle portion, and to maintain the same distance as that in the related art in the end portion.

主权项

1. A magnetic resonance imaging apparatus comprising:
a magnet that generates a static magnetic field space to form the static magnetic field; and an RF coil that performs at least one of transmitting a high frequency signal into a space of the static magnetic field and receiving a nuclear magnetic resonance signal which is generated from an object disposed inside the static magnetic field, wherein the RF coil includes
a sheet-like conductor, andplural rung sections, wherein the sheet-like conductor has a tubular shape, wherein each of the plural rung sections includes
a rung conductor, andcapacitors which connect the sheet-like conductor with two end portions of the rung conductor, respectively, wherein each rung conductor of the plural rung sections is disposed in the internal portion of the tubular shape formed by the sheet-like conductor so as to be spaced at a predetermined distance from the sheet-like conductor and to be substantially parallel to an axial direction of the tubular shape, respectively, the axial direction being a longitudinal direction of the tubular shape, wherein the rung conductor is configured to include a void space in a middle portion of the rung conductor and to cause a distance between adjacent rung conductors on the middle portion to be smaller than a distance between adjacent rung conductors on the end portion, and wherein the capacitor is adjusted to configure a loop circuit with the rung section and the sheet-like conductor, the loop circuit resonating with a frequency of the high frequency signal or the nuclear magnetic resonance signal.