System and method for artifact reduction in an image
AssigneesMedtronic Navigation, Inc., The Johns Hopkins University
InventorsPatrick A. Helm, Jeffrey H. Siewerdsen, Ali Uneri, Wojciech Zbijewski, Xiaoxuan Zhang, Joseph W. Stayman, IV
Life of this patent
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Abstract
Selected artifacts, which may be based on distortions or selected attenuation features, may be reduced or removed from a reconstructed image. Various artifacts may occur due to the presence of a metal object in a field of view. The metal object may be identified and removed from a data that is used to generate a reconstruction.
Claims26
A method of reducing artifacts in an image reconstruction of a subject due to an object within the subject, comprising:
- accessing known component parameters of the object;
- creating at least one forward projection of the object based on the accessed known component parameters;
- registering the object in the forward projection to at least one acquired projection having the object therein;
- modifying the at least one acquired projection to a representation of the registered object;
- and
- generating the image reconstruction based on the modified at least one acquired projection.
A system for reducing artifacts in a reconstructed image of a subject due to an object within the subject, comprising:
- a processor system configured to execute instructions for:
- accessing known component parameters of the object;
- creating at least one forward projection of the object based on the accessed known component parameters;
- registering the object in the created forward projection to at least one acquired projection of the subject having the object therein;
- modifying the at least one acquired projection based on a representation of the registered object in the created forward projection;
- and
- generating the reconstructed image based on the modified at least one acquired projection;
- and
- a display device to display a visualization based on the generated reconstructed image.
A method of reducing artifacts in a reconstructed image of a subject due to an object, comprising:
- operating a processor system for:
- accessing parameters of the object;
- creating at least one forward projection of the object based on the accessed parameters;
- registering the object in the created forward projection to at least one acquired projection of the subject having the object therein;
- modifying the at least one acquired projection of the subject based on a representation of the registered object in the created forward projection;
- generating the reconstructed image of the subject based on the modified at least one acquired projection;
- and
- generating a visualization at least by replacing voxels or pixels that coincide with the registered object in the modified at least one acquired projection of the subject;
- displaying the visualization of the generated reconstructed image of the subject.
Dependencies are inferred from the claim text.