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Contrast Enhanced MRA With Highly Constrained Backprojection Reconstruction Using Phase Contrast Composite Image

  • US 20100286504A1
  • Filed: 12/28/2007
  • Published: 11/11/2010
  • Est. Priority Date: 01/02/2007
  • Status: Active Grant
First Claim
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1. A method for producing a contrast enhanced image of a subject positioned in the field of view (FOV) of a magnetic resonance imaging (MRI) system, the steps comprising:

  • a) acquiring with the MRI system a set of phase contrast views of the subject positioned in the FOV;

    b) reconstructing a phase contrast composite image from the phase contrast views which indicates a motion value at each composite image pixel of the subject positioned in the FOV;

    c) acquiring with the MRI system a set of mask views;

    d) acquiring with the MRI system a time frame data set comprised of an undersampled set of contrast enhanced views of the subject positioned in the FOV after the arrival of the contrast agent;

    e) repeating step d) to acquire a plurality of time frame data sets during the in flow of contrast agent into the FOV;

    f) subtracting mask views from the contrast enhanced views to obtain sparse contrast enhanced views for each time frame; and

    g) performing a HYPR reconstruction to produce a contrast enhanced image of the subject for each time frame using both the sparse contrast enhanced views for the time frame and the phase contrast composite image.

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