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Motion correction for magnetic resonance angiography (MRA) with 3D radial acquisitions

  • US 9,788,761 B2
  • Filed: 02/27/2014
  • Issued: 10/17/2017
  • Est. Priority Date: 02/27/2014
  • Status: Active Grant
First Claim
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1. A magnetic resonance imaging (MRI) system for effecting magnetic resonance (MR) images with reduced motion artifacts, said MRI system comprising:

  • an MRI gantry including a static magnetic field coil, gradient magnetic field coils, at least one radio frequency (RF) coil configured to transmit RF signals into an imaging volume and/or to receive nuclear magnetic resonance (NMR) RF signals from an object located in the imaging volume; and

    at least one digital data processor coupled to receive digitized MR data from said at least one RF coil, said at least one processor being configured to;

    acquire a plurality of k-space data sets, each k-space data set being acquired by traversing a plurality of radial trajectories of locations in three-dimensional (3D) k-space;

    generate a plurality of 3D MR images, each 3D MR image derived from a k-space populated by a respective one of the k-space data sets;

    align the 3D MR images with respect to each other;

    determine one or more motion parameters for the object based upon the aligning;

    modify, using the determined one or more motion parameters, values of at least one of the acquired k-space data sets;

    generate a motion-corrected 3D MR image by constructing it from a set of corrected sets of acquired k-space data including the modified values; and

    output the motion-corrected 3D MR image to a display, a data storage, or to a data transmission port.

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