Abstract Two high-frequency coil systems are concentric with a common symmetry axis and are adapted to be connected to a high-frequency transmitter and/or a high-frequency receiver. The field directions of the systems enclose an angle of 90° with respect to one another. Such a quadrature system can be used as a whole-body coil in a magnetic resonance examination apparatus whose magnetic field extends perpendicular to the longitudinal axis of a patient to be examined. The first high-frequency coil system comprises a plurality of inductively coupled, annular conductor loops mutually offset along the symmetry axis, the second coil system comprising conductors arranged in parallel planes and which enclose the symmetry axis arc-like and which are interconnected via conductors extending parallel to the symmetry axis.
A quadrature coil system for a magnetic resonance examination apparatus, comprising two high-frequency coil systems which are concentric with respect to a common symmetry axis and adapted to be connected to one of a high-frequency transmitter and a high-frequency receiver, the field directions of the coil systems enclosing an angle of 90° with respect to one another, the first high-frequency coil system comprising a plurality of annular conductor loops inductively coupled to one another and which are mutually offset along the symmetry axis, the second coil system comprising conductors arranged in parallel planes perpendicular to the symmetry axis and which enclose the symmetry axis arc-like and which are interconnected via conductors extending parallel to the symmetry axis.
Claim 2
Dependent Claim
117 words
A quadrature coil system for a magnetic resonance examination apparatus, comprising two high-frequency coil systems which are concentric with respect to a common symmetry axis and adapted to be connected to one of a high-frequency transmitter and a high-frequency receiver, the field directions of the coil systems enclosing an angle of 90° with respect to one another, the first high-frequency coil system comprising a plurality of annular conductor loops inductively coupled to one another and which are mutually offset along the symmetry axis, the second coil system comprising conductors arranged in parallel planes perpendicular to the symmetry axis and which enclose the symmetry axis arc-like and which are interconnected via conductors extending parallel to the symmetry axis.
Claim 3
Dependent Claim
58 words
A quadrature coil system as claimed in claim 1 wherein the second high-frequency coil system comprises two conductor loops offset with respect to one another in the direction of the symmetry axis and interconnected via said conductors and reactance elements in the conductor loop portions arranged in one of between two of said conductors and in the conductors.
Claim 4
Dependent Claim
21 words
A quadrature coil system as claimed in claim 1, wherein the first high-frequency coil system encloses the second high-frequency coil system.