Iterative CT reconstruction method using multi-modal edge information
AssigneeGeneral Electric Company
InventorsQi Zhao, Chunhe Gong, Bruno De Man, Samit Kumar Basu, Fracis Howard Little
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Abstract
A computed tomography (CT) reconstruction method includes implementing an iterative image reconstruction process for CT metrology of an object, wherein the iterative reconstruction process utilizes accurate forward projection. During each of a plurality of iterations, a reconstructed image is constrained by utilizing prior outer edge information obtained from a modality in addition to CT, and then transformed to a projection domain so as to generate a calculated sinogram. A correction image is determined based on the calculated sinogram and a measured sinogram.
Claims14
A method for implementing an iterative reconstruction of a computed tomography (CT) image, the method comprising:
- during each of a plurality of iterations, generating a reconstructed image;
- constraining said reconstructed image at each successive iteration by utilizing prior outer edge information obtained from a modality in addition to CT;
- transforming said constrained reconstructed image to a projection domain so as to generate a calculated sinogram;
- determining at least one of a correction image and a corrected image based on said calculated sinogram and a measured sinogram;
- and
- displaying the corrected image.
A method for implementing an iterative reconstruction of a computed tomography (CT) image, the method comprising:
- during each of a plurality of iterations, generating a reconstructed image;
- constraining said reconstructed image at each successive iteration utilizing prior outer edge information obtained from a modality in addition to CT and transforming said constrained reconstructed image to a projection domain so as to generate a calculated sinogram;
- determining at least one of a correction image or a corrected image based on said calculated sinogram and a measured sinogram;
- and
- displaying the corrected image;
- wherein the iterative reconstruction utilizes a forward projection in determining said calculated sinogram.
A storage medium, comprising:
- a machine readable computer program code for implementing an iterative reconstruction of a computed tomography (CT) image;
- and
- instructions for causing a computer to implement a method, the method further comprising:
- during each of a plurality of iterations, generating a reconstructed image;
- modifying said reconstructed image at each successive iteration by utilizing prior outer edge information obtained from a modality in addition to CT;
- transforming said modified, reconstructed image to a projection domain so as to generate a calculated sinogram;
- determining at least one of a correction image and a corrected image based on said calculated sinogram and a measured sinogram;
- and
- displaying the corrected image;
- wherein the iterative reconstruction utilizes forward projection constraints in determining said calculated sinogram.
A computed tomography (CT) reconstruction method, the method comprising:
- implementing an iterative image reconstruction process for CT metrology of an object, wherein said iterative reconstruction process utilizes prior outer edge information at each successive iteration obtained from a modality in addition to CT;
- and
- displaying an image created by the iterative reconstruction process.
Dependencies are inferred from the claim text.