×

MR device with a reference coil system for the reconstruction of MR images from a coil array

  • US 5,945,826 A
  • Filed: 08/19/1997
  • Issued: 08/31/1999
  • Est. Priority Date: 08/28/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. An MR device comprising:

  • a magnet for generating a uniform, steady magnetic field in an examination zone,an RF system for generating magnetic RF pulses in the examination zone,a coil array system comprising a plurality of coil elements for receiving MR image signals from an object present in the examination zone,a reference coil system for receiving MR reference signals from the object, wherein the reference coil system includes at least four coil elements which are mutually offset and grouped around the examination zone in a cross-section perpendicular to the direction of the uniform, steady magnetic field, and the coil elements of the reference coil system have number, dimensions, and construction such that only slight inductive coupling occurs between the coil array system and the reference coil system, anda receiving and processing unit for forming an MR image by (i) deriving image data from the MR image signals of coil elements of the coil array system, (ii) deriving reference data from the MR reference signals from the reference coil system, (iii) correcting the derived image data by the derived reference data so that location-dependent sensitivity of the coil elements of the array coil system does not affect image quality, and (iv) deriving the MR image from the corrected image data.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×