Magnetic resonance fingerprinting based on bloch manifold and spatial regularizations in parallel
AssigneeSiemens Healthcare GmbH
InventorsSimon Arberet, Boris Mailhe, Xiao Chen, Mariappan S. Nadar
Life of this patent
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Abstract
Systems and methods are provided for iterative reconstruction of a magnetic resonance image using magnetic resonance fingerprinting. An image series is estimated according to the following four steps: a gradient step to improve data consistency, fingerprint matching, spatial regularization, and a merging step. The fingerprint matching and spatial regularization steps are performed in parallel.
Claims20
A method for generating a reconstructed image of an object, the method comprising:
- acquiring one or more compressed images from one or more magnetic resonance k-space signals obtained from the object;
- iteratively reconstructing an image, wherein each iteration comprises:
- updating the one or more compressed images with a gradient;
- applying fingerprint matching to the one or more updated compressed images to generate one or more first compressed images;
- applying spatial regularization to the one or more updated compressed images to generate one or more second compressed images;
- merging the one or more first compressed images and the one or more second compressed images, wherein the one or more merged compressed images are used as input for a subsequent iteration;
- and
- displaying the reconstructed image.
A method for generating a magnetic resonance image of an object, the method comprising:
- acquiring MR image data from one or more magnetic resonance k-space signals obtained from the object;
- compressing a dictionary to a value;
- performing data fidelity on the MR image data;
- searching the compressed dictionary for a representative magnetic resonance fingerprint;
- generating a first compressed image using the representative magnetic resonance fingerprint;
- applying spatial regularization to the compressed image to generate a second compressed image;
- merging the first compressed image and the second compressed image;
- and
- repeating for at least two iterations the steps of performing, searching, generating, applying, and merging.
A system for generating an image using magnetic resonance fingerprinting , the system comprising:
- a magnetic resonance imaging device configured to acquire MR data;
- a control unit comprising:
- a memory configured to store a compressed dictionary of magnetic resonance fingerprints;
- and
- an image processor configured to iteratively construct the image from the MR data in parallel using the compressed dictionary of magnetic resonance fingerprints and spatial regularization.
Dependencies are inferred from the claim text.