System and method for image reconstruction
AssigneeShanghai United Imaging Healthcare Co., Ltd.
InventorsYang Lyu, Yu Ding
Life of this patent
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Abstract
A system and method for image reconstruction are provided. A first region of an object may be determined. The first region may correspond to a first voxel. A second region of the object may be determined. The second region may correspond to a second voxel. Scan data of the object may be acquired. A first regional image may be reconstructed based on the scan data. The reconstruction of the first regional image may include a forward projection on the first voxel and the second voxel and a back projection on the first voxel.
Claims16
A method for image reconstruction, comprising:
- determining an image matrix corresponding to a scanned region;
- dividing the image matrix into a plurality of sub-image matrixes, each sub-image matrix corresponding to a sub-scanned region of the scanned region;
- transforming at least one sub-image matrix of the plurality of sub-image matrixes to generate at least one transformed matrix;
- reconstructing the at least one sub-image matrix based on the at least one transformed matrix by:
- generating, based on a subset of scan data relating to the scanned region, at least one projection matrix by performing a forward projection on the at least one transformed matrix;
- generating at least one preliminary matrix by performing a back projection on the at least one projection matrix;
- inversely rearranging the at least one preliminary matrix;
- generating a rotated matrix by rotating the at least one rearranged preliminary matrix in a second direction, the second direction being opposite to the first direction;
- and
- generating, based on the rotated matrix, the at least one reconstructed sub-image matrix;
- and
- reconstructing the image matrix based on the at least one reconstructed sub-image matrix.
A system, comprising:
- at least one storage device including a set of instructions for image reconstruction;
- and
- at least one processor configured to communicate with the at least one storage medium, wherein when executing the set of instructions, the at least one processor is configured to direct the system to perform operations including:
- determining an image matrix corresponding to a scanned region;
- dividing the image matrix into a plurality of sub-image matrixes, each sub-image matrix corresponding to a sub-scanned region of the scanned region;
- transforming at least one sub-image matrix of the plurality of sub-image matrixes to generate at least one transformed matrix;
- reconstructing the at least one sub-image matrix based on the at least one transformed matrix by:
- generating, based on a subset of scan data relating to the scanned region, at least one projection matrix by performing a forward projection on the at least one transformed matrix;
- generating at least one preliminary matrix by performing a back projection on the at least one projection matrix;
- inversely rearranging the at least one preliminary matrix;
- generating a rotated matrix by rotating the at least one rearranged preliminary matrix in a second direction, the second direction being opposite to the first direction;
- and
- generating, based on the rotated matrix, the at least one reconstructed sub-image matrix;
- and
- reconstructing the image matrix based on the at least one reconstructed sub-image matrix.
A non-transitory computer readable medium, comprising a set of instructions for image reconstruction, wherein when executed by at least one processor, the set of instructions direct the at least one processor to effectuate a method, the method comprising:
- determining an image matrix corresponding to a scanned region;
- dividing the image matrix into a plurality of sub-image matrixes, each sub-image matrix corresponding to a sub-scanned region of the scanned region;
- transforming at least one sub-image matrix of the plurality of sub-image matrixes to generate at least one transformed matrix;
- reconstructing the at least one sub-image matrix based on the at least one transformed matrix by:
- generating, based on a subset of scan data relating to the scanned region, at least one projection matrix by performing a forward projection on the at least one transformed matrix;
- generating at least one preliminary matrix by performing a back projection on the at least one projection matrix;
- inversely rearranging the at least one preliminary matrix;
- generating a rotated matrix by rotating the at least one rearranged preliminary matrix in a second direction, the second direction being opposite to the first direction;
- and
- generating, based on the rotated matrix, the at least one reconstructed sub-image matrix;
- and
- reconstructing the image matrix based on the at least one reconstructed sub-image matrix.
Dependencies are inferred from the claim text.