Robust coronary MR angiography MR without respiratory navigation
AssigneeGeneral Electric Company
InventorsChristopher Hardy, Manojkumar Saranathan
Life of this patent
Estimating the term…
Abstract
A method for acquiring image data from a subject during a scan with a Magnetic Resonance Imaging (MRI) system comprising the steps of acquiring a reference data set of a region of interest, acquiring a plurality of free-breathing data sets, and, selectively processing the plurality of free-breathing data sets in comparison with the reference data set to be used in creating an image of the region of interest. The reference data set comprises breath-held data set or, alternatively, free-breathing data.
Claims14
1-12. (canceled)
A method for acquiring image data from a subject during a scan with a Magnetic Resonance Imaging (MRI) system comprising:
- acquiring a breath-held image data set of said region of interest with spiral scanning;
- acquiring a plurality of free-breathing data sets of said region of interest with spiral scanning;
- comparing respective interleaves from said breath-held data set at a given interleaf angle with respective corresponding interleaves of said plurality of free-breathing data sets at said given interleaf angle to select a predetermined plurality of matched interleaves from said free-breathing data sets;
- and,
- averaging said predetermined plurality of matching interleaves for use in generating an image of said region of interest.
A method of acquiring and reconstructing an image of a dynamic region of interest using a Magnetic Resonance Imaging (MRI) system comprising:
- acquiring a reference data set of said region of interest using spiral trajectory scanning;
- reconstructing each respective spiral interleaf of said reference data set for each interleaf angle of said spiral trajectory into respective complex reference sub-images;
- acquiring a plurality of free-breathing data sets of said region of interest using spiral trajectory scanning;
- reconstructing each respective spiral acquisition of said plurality of free-breathing data sets at for each interleaf angle of said spiral trajectory into corresponding free-breathing complex sub-images;
- comparing said respective breath-held and corresponding free-breathing complex sub-images to select matching acquisitions for each interleaf angle from said free-breathing data sets;
- and,
- averaging said matching acquisitions at each interleaf angle;
- and,
- assembling and summing said averaged matching acquisitions to generate an image of said region of interest.
The method of claim 20 wherein said region of interest is a coronary artery.
A method for acquiring image data from a subject without breath-holding during a scan with a Magnetic Resonance Imaging (MRI) system comprising:
- acquiring a reference data set of a region of interest during free-breathing;
- acquiring a plurality of additional free-breathing data sets of said region of interest;
- and,
- selectively processing said plurality of additional free-breathing data sets in comparison with said reference data set for use in generating a image of said region of interest.
Dependencies are inferred from the claim text.