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US 12,622,653 B2Granted
Method and apparatus for reconstructing CT images
AssigneeSiemens Healthineers AG
InventorsAndre Ritter, Thomas Allmendinger
Life of this patent
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Abstract
A method for reconstructing CT images, comprises: providing CT recording data; reconstructing overlapping partial images; establishing displacement vectors for registering overlap regions of the partial images; interpolating a displacement vector field for each partial image from associated sets of the displacement vectors of the two side regions; creating an output image dataset based on the CT recording data and the displacement vector fields; and outputting the output image dataset.
Claims28
A method for reconstructing Computed Tomography (CT) images, the method comprising:
- providing CT recording data including recordings of a plurality of overlapping partial image volumes;
- reconstructing a working image dataset from the CT recording data, the working image dataset including a plurality of partial images, and each respective partial image among the plurality of partial images having an overlap region with at least one corresponding partial image from among the plurality of partial images such that the plurality of partial images includes a plurality of overlap regions;
- establishing subsets of displacement vectors associated with two opposing side regions of each of the plurality of partial images;
- interpolating a corresponding displacement vector field for each respective partial image among the plurality of partial images from the subsets of the displacement vectors associated with the two opposing side regions of the respective partial image to obtain a plurality of displacement vector fields, two sides of the corresponding displacement vector field corresponding to the subsets of the displacement vectors, the interpolating including interpolating the subsets of the displacement vectors between the two sides of the corresponding displacement vector field based on a transfer function from a first subset of the displacement vectors to a second subset of the displacement vectors, and the subsets of the displacement vectors including the first subset and the second subset;
- creating an output image dataset based on the CT recording data and the plurality of displacement vector fields;
- and
- outputting the output image dataset.
4 more elements
An apparatus for reconstructing Computed Tomography (CT) images, the apparatus comprising:
- a first data interface configured to receive CT recording data including recordings of a plurality of overlapping partial image volumes;
- a working reconstruction unit configured to reconstruct a working image dataset from the CT recording data, the working image dataset including a plurality of partial images, and each respective partial image among the plurality of partial images having an overlap region with at least one corresponding partial image from among the plurality of partial images such that the plurality of partial images includes a plurality of overlap regions;
- a displacement unit configured to establish subsets of displacement vectors associated with two opposing side regions of each of the plurality of partial images;
- a vector field unit configured to interpolate a corresponding displacement vector field for each respective partial image among the plurality of partial images from the subsets of the displacement vectors associated with the two opposing side regions of the respective partial image to obtain a plurality of displacement vector fields, two sides of the corresponding displacement vector field corresponding to the subsets of the displacement vectors, the interpolation including interpolating the subsets of the displacement vectors between the two sides of the corresponding displacement vector field based on a transfer function from a first subset of the displacement vectors to a second subset of the displacement vectors, and the subsets of the displacement vectors including the first subset and the second subset;
- a second reconstruction unit configured to create an output image dataset based on the CT recording data and the plurality of displacement vector fields;
- and
- a second data interface configured to output the output image dataset.
4 more elements
An apparatus for reconstructing CT images, the apparatus comprising:
- at least one processor configured to execute computer-executable instructions to cause the apparatus to
- receive CT recording data including recordings of a plurality of overlapping partial image volumes,
- reconstruct a working image dataset from the CT recording data, the working image dataset including a plurality of partial images, and each respective partial image among the plurality of partial images having an overlap region with at least one corresponding partial image from among the plurality of partial images such that the plurality of partial images includes a plurality of overlap regions,
- establish subsets of displacement vectors associated with two opposing side regions of each of the plurality of partial images,
- interpolate a corresponding displacement vector field for each respective partial image among the plurality of partial images from the subsets of the displacement vectors associated with the two opposing side regions of the respective partial image to obtain a plurality of displacement vector fields, two sides of the corresponding displacement vector field corresponding the subsets of the displacement vectors, the interpolation including interpolating the subsets of the displacement vectors between the two sides of the corresponding displacement vector field based on a transfer function from a first subset of the displacement vectors to a second subset of the displacement vectors, and the subsets of the displacement vectors including the first subset and the second subset,
- create an output image dataset based on the CT recording data and the plurality of displacement vector fields, and
- output the output image dataset.
4 more elements
Dependencies are inferred from the claim text.