TEM RESONATOR SYSTEM ESPECIALLY FOR USE IN AN MRI SYSTEM

摘要

A TEM resonator system is disclosed comprising at least two TEM resonators (21,31; 22, 32), especially in the form of TEM volume coils, and especially for use in an MR imaging system or apparatus for transmitting RF excitation signals and/or for receiving MR signals into/from an examination object or a part thereof, respectively, wherein the TEM resonators are arranged and displaced along a common longitudinal axis and wherein an intermediate RF shield (4) is positioned in longitudinal direction between the two TEM resonators for at least substantially preventing electromagnetic radiation from emanating from between the first TEM resonator and the second TEM resonator into the surroundings. A PET detector and/or another supplementary element can be placed in the volume between the two TEM resonators.

主权项

1. TEM resonator system especially for use in an MR imaging system, the TEM resonator system being characterized in:
a first TEM cylindrical volume resonator which comprises a first RF shield and a plurality of first conductors which are capacitively or galvanically coupled to the first RF shield, and a second TEM cylindrical volume resonator which comprises a second RF shield (32) and a plurality of second conductors which are capacitively or galvanically coupled to the second RF shield (32), wherein the TEM cylindrical volume resonators are arranged and displaced from each other along a common longitudinal axis, which is aligned with the respective longitudinal axis of each of the first TEM cylindrical volume resonantor and the second cylindrical TEM volume resonantor, and an intermediate RF shield which is positioned between the first and the second TEM cylindrical volume resonator and which capacitively or galvanically connects the first RF shield with the second RF shield, and wherein the intermediate RF shield is composed of at least one radial ring and/or at least one cylinder, both being arranged coaxial with the common longitudinal axis, wherein the inner and/or the outer radial dimension of the at least one radial ring and/or the axial length and/or the radial dimension of the at least one cylinder being dimensioned for at least substantially preventing electromagnetic radiation from emanating outward from between the first TEM cylindrical volume resonator and the second TEM cylindrical volume resonator toward their surroundings.