MR apparatus provided with a cylindrical coil system and a surface coil system
First Claim
1. An MR apparatus for the reception of MR signals from an examination zone exposed to a steady, uniform magnetic field and superposed gradient magnetic fields, after excitation by an RF magnetic field, using an MR coil system comprisinga cylindrical coil system,a surface coil system, wherein the cylindrical coil system and the surface coil system overlap at most partially in a region of overlap in order to decouple the surface coil system and the cylindrical coil system, andmeans for adjusting the magnitude of the at most partial overlap of the cylindrical coil system and the surface coil system.
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Accused Products
Abstract
An MR apparatus which includes a cylindrical coil system and a surface coil system. In order to form a coherent MR image of an as large as possible examination zone by means of an MR apparatus, without necessitating the use of a larger number of receiving channels with respect to a conventional MR apparatus, the cylindrical coil system, for example a bird-cage resonator, and the surface coil system, for example a quadrature coil system, are arranged to overlap and the magnitude of the region of overlap can be varied in order to reduce mutual coupling.
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Citations
19 Claims
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1. An MR apparatus for the reception of MR signals from an examination zone exposed to a steady, uniform magnetic field and superposed gradient magnetic fields, after excitation by an RF magnetic field, using an MR coil system comprising
a cylindrical coil system, a surface coil system, wherein the cylindrical coil system and the surface coil system overlap at most partially in a region of overlap in order to decouple the surface coil system and the cylindrical coil system, and means for adjusting the magnitude of the at most partial overlap of the cylindrical coil system and the surface coil system.
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17. An MR coil system comprising
a cylindrical coil system, a surface coil system wherein the cylindrical coil system and the surface coil system overlap at most partially in a region of overlap in order to decouple the surface coil system and the cylindrical coil system, and means for adjusting the magnitude of the at most partial overlap of the cylindrical coil system and the surface coil system.
Specification