Scan data correction view weighting of computed tomographic images
AssigneeGE Medical Systems Global Technology Company, LLC
InventorsSharon X. Wang, Roy-Arnulf Helge Nilsen, John A. Fusco
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Abstract
One aspect of the present invention is a method for reconstructing computed tomographic (CT) images. The method includes generating a plurality of projection data, calculating a plurality of base weights using the projection data for each series of images to be reconstructed, storing the base weights in an external memory, and applying a z-smoothing module to the base weights to determine a plurality of final weights. The view weighting process then includes applying the final weights to the projection data for each image.
Claims25
A method for generating computed tomographic (CT) images, said method comprising:
- generating a plurality of projection data;
- calculating a plurality of base weights using the projection data;
- storing the base weights in a memory;
- and
- applying a z-smoothing module to the base weights to determine a plurality of final weights.
A computer programmed to generate computed tomographic (CT) images, said computer programmed to:
- generate a plurality of projection data;
- calculate a plurality of base weights using the projection data;
- store the base weights in a memory;
- and
- apply a z-smoothing module to the base weights to determine a plurality of final weights.
A computer-readable medium encoded with a computer program, said program configured to:
- generate a plurality of projection data;
- calculate a plurality of base weights using the projection data;
- store the base weights in a memory;
- and
- apply a z-smoothing module to the base weights to determine a plurality of final weights.
A computed tomographic (CT) imaging system for reconstructing an image of an object, said imaging system comprising:
- a detector array;
- at least one radiation source;
- and
- a computer coupled to said detector array and said radiation source, said computer configured to:
- generate a plurality of projection data;
- calculate a plurality of base weights using the projection data;
- store the base weights in a memory;
- and
- apply a z-smoothing module to the base weights to determine a plurality of final weights.
A computed tomographic (CT) imaging system for reconstructing an image of an object, said imaging system comprising:
- a detector array;
- at least one radiation source;
- and
- a computer coupled to said detector array and said radiation source, said computer configured to:
- generate a plurality of projection data;
- calculate a plurality of base weights using the projection data;
- store the base weights in a memory;
- apply a z-smoothing module to the base weights to determine a plurality of final weights;
- and
- apply the final weights to a plurality of pre-processed projection data using one multiplication and one summation.
Dependencies are inferred from the claim text.