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Method for determining the position of a local antenna in an examination chamber of a magnetic resonance apparatus

  • US 5,936,406 A
  • Filed: 12/22/1997
  • Issued: 08/10/1999
  • Est. Priority Date: 12/20/1996
  • Status: Expired due to Term
First Claim
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1. A method for determining a position of at least one local antenna in an examination chamber of a magnetic resonance apparatus, comprising the steps of:

  • receiving magnetic resonance signals, emitted by a subject disposed in an examination chamber using an antenna disposed in said examination chamber having a homogenous sensitivity distribution, and locus-encoding said magnetic resonance signals in at least one coordinate direction to obtain locus-encoded signals;

    from said locus-encoded signals, obtaining image data, in a form of first intensity values, locus-resolved in said at least one coordinate direction;

    receiving magnetic resonance signals emitted by said subject using at least one local antenna disposed in said examination chamber, and locus-encoding said magnetic resonance signals received by said at least one local antenna to obtain local antenna locus-encoded signals;

    from said local antenna locus-encoded signals, obtaining image data, in a form of second intensity values, locus-resolved in said at least one coordinate direction, said second intensity values respectively having coordinate values associated therewith;

    from said second intensity values, forming normalized intensity values by relating said second intensity values respectively to said first intensity values having the same respective coordinate values;

    searching said normalized intensity values for a largest normalized intensity value, said first intensity values respectively having coordinate values associated therewith; and

    selecting a coordinate value associated with said largest normalized intensity value as an identification of the position of said at least one local antenna in said at least one coordinate direction.

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