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SYSTEM AND METHOD FOR OBJECT-BASED INITIALIZATION OF MAGNETIC FIELD INHOMOGENEITY IN MAGNETIC RESONANCE IMAGING

  • US 20150145514A1
  • Filed: 11/25/2013
  • Published: 05/28/2015
  • Est. Priority Date: 11/25/2013
  • Status: Active Grant
First Claim
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1. A method for estimating inhomogeneities in a magnetic field of a magnetic resonance imaging (MRI) system, the steps of the method comprising:

  • a) directing the MRI system to acquire k-space data from an imaging volume at a plurality of different echo times;

    b) reconstructing an image for each of the plurality of echo times using the k-space data acquired at the respective echo time;

    c) estimating a distribution of magnetic susceptibility values in the imaging volume using information in the images reconstructed in step b); and

    d) estimating a magnetic field inhomogeneity map from the distribution of magnetic susceptibility values estimated in step c).

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