Method of reconstructing an MR image
First Claim
1. A method of reconstruction an MR image from MR signals that are acquired in parallel by a plurality of receiving coils with incomplete sampling of the spatial frequency space, the reconstructed MR image being calculated iteratively as the solution of a system of linear equations, wherein the iteration process begins with a starting image which approximates to the MR image to be reconstructed, in such a way that undersampling artifacts are suppressed in the intermediate solutions of the system of linear equations that are obtained during the course of the iteration process, wherein the starting image is generated by reconstructing restricted sub-regions, of the starting image from those MR signals that are acquired by receiving coils that have high respective sensitivities in these sub-regions.
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Abstract
An MR image (14) is reconstructed from MR signals (1, 2, 3, 4) that are acquired in parallel by a plurality of receiving coils (5, 6, 7, 8) with incomplete sampling of the spatial frequency space. The reconstructed MR image (14) is calculated iteratively as the solution of a system of linear equations. To provide a more highly developed method for parallel SENSE imaging, an iteration process (15) begins with a starting image (9) which approximates to the MR image to be reconstructed (14), in such a way that undersampling artifacts are suppressed in the intermediate solutions of the system of equations that are obtained during the course of the iteration process.
68 Citations
14 Claims
- 1. A method of reconstruction an MR image from MR signals that are acquired in parallel by a plurality of receiving coils with incomplete sampling of the spatial frequency space, the reconstructed MR image being calculated iteratively as the solution of a system of linear equations, wherein the iteration process begins with a starting image which approximates to the MR image to be reconstructed, in such a way that undersampling artifacts are suppressed in the intermediate solutions of the system of linear equations that are obtained during the course of the iteration process, wherein the starting image is generated by reconstructing restricted sub-regions, of the starting image from those MR signals that are acquired by receiving coils that have high respective sensitivities in these sub-regions.
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5. The method of reconstructin a new MR image:
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acquiring MR signals that are acquired in parallel by a plurality of receiving coils with incomplete sampling of the spatial frequency space; reconstructing a current MR image by iteratively calculating a solution of a system of linear equations, the iteration process beginning with a starting image, in such a way that undersampling artifacts are suppressed in the intermediate solutions of the system of linear equations that are obtained during the course of the iteration process, the starting image being a prior MR image that was reconstructed prior to and is similar to the current MR image currently being reconstructed. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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