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Resonator system

  • US 20060017440A1
  • Filed: 06/13/2005
  • Published: 01/26/2006
  • Est. Priority Date: 07/23/2004
  • Status: Active Grant
First Claim
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1. A resonator system for generating a radio frequency (RF) magnetic field in a volume under investigation of a magnetic resonance (MR) apparatus, the resonator system comprising:

  • a number N of individual resonators which surround the volume under investigation and which are each disposed, about a z-axis, on a flat dielectric substrate, each individual resonator having a window through which one individual RF field is generated in the volume under investigation in single operation of the respective individual resonator, said individual resonators cooperating to generate a useful RF field in the volume under investigation, said resonators also generating an asymptotic, remote RF field far outside of the resonator system, wherein a spatial distribution of said useful RF field is substantially mirror-symmetrical relative to a first plane A which contains the z-axis, and a spatial distribution of said asymptotic remote RF field is substantially mirror-symmetrical relative to a second plane B which contains the z-axis, said useful RF field extending substantially parallel to said first plane A in the volume under investigation, wherein a number of individual resonators N>

    4 and, at at least one point in time during operation of the resonator system, a substrate plane of at least one individual resonator subtends an angle of more than 40°

    with respect to a direction of said useful RF field in the volume under investigation, and at least one further individual resonator subtends an angle of less than 40°

    with respect to said direction of the useful RF field in the volume under investigation, wherein said first plane A is not rotated about the z-axis relative to said second plane B or is rotated about the z-axis relative to said second plane B by less than 360°

    /(N+1).

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