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Inherently de-coupled sandwiched solenoidal array coil

  • US 6,751,496 B2
  • Filed: 08/24/2001
  • Issued: 06/15/2004
  • Est. Priority Date: 09/30/1999
  • Status: Expired due to Term
First Claim
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1. In a MRI system having multiple data acquisition channels for producing images from NMR signals emanating from a subject irradiated with an RF excitation pulse in the presence of a static polarizing magnetic field, said system having a sandwiched solenoidal array coil for receiving the NMR signals emanating from a region of interest in the subject, said sandwiched solenoidal array coil comprising a plurality of coil elements wherein at least one array coil element is a first solenoidal loop coil sandwiched between a pair of solenoidal coil sections having opposite conductor winding directions and which form a second array coil element distinct from said first coil, a method for providing field-of-view (FOV) switching without incurring substantial data fold-over artifacts or significantly increasing data acquisition time, comprising:

  • a) providing NMR signals received by the first solenoidal loop coil to a first data acquisition channel of the MRI system for processing;

    b) providing NMR signals received by the sandwiching pair of solenoidal coil sections which form the separate second array coil element to a second data acquisition channel of the MRI system for processing;

    c) during an MRI scanning sequence, acquiring and storing data from both the first and the second data acquisition channels simultaneously; and

    d) after acquiring NMR signal data for producing an image, selecting between;

    (i) processing NMR signal data acquired from both the first and the second data acquisition channels together to produce a large FOV image or (ii) processing NMR signal data acquired from either said first or said second data acquisition channel alone to produce a small FOV image.

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