METHODS AND SYSTEMS FOR METAL ARTIFACT REDUCTION IN SPECTRAL CT IMAGING
First Claim
Patent Images
1. A method, comprising:
- acquiring a first projection dataset and a second projection dataset;
detecting a location of metal in the first projection dataset based on a metal threshold;
applying corrections to the first and second projection datasets based on the location of the metal; and
displaying an image reconstructed from the corrected first and second projection datasets.
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Abstract
Various methods and systems for spectral computed tomography imaging are provided. In one embodiment, a method comprises acquiring a first projection dataset and a second projection dataset, detecting a location of metal in the first projection dataset, applying corrections to the first and second projection datasets based on the location of the metal, and displaying an image reconstructed from the corrected first and second projection datasets. In this way, metal artifacts may be substantially reduced in dual or multi-energy CT imaging.
22 Citations
20 Claims
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1. A method, comprising:
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acquiring a first projection dataset and a second projection dataset; detecting a location of metal in the first projection dataset based on a metal threshold; applying corrections to the first and second projection datasets based on the location of the metal; and displaying an image reconstructed from the corrected first and second projection datasets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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acquiring a first projection dataset and a second projection dataset; generating a first metal-reduced projection dataset based on the first projection dataset and a second metal-reduced projection dataset based on the second projection dataset and the first projection dataset; decomposing the first and the second metal-reduced projection datasets into a first metal-reduced material basis and a second metal-reduced material basis, and the first and the second projection datasets into a first material basis and a second material basis; reconstructing a first metal-reduced material image based on the first metal-reduced material basis, a second metal-reduced material image based on the second metal-reduced material basis, a first material image based on the first material basis, and a second material image based on the second material basis; generating a first metal image and a second metal image based on the first material image and the second material image; generating a first metal-corrected image by combining the first metal image and the first metal-reduced material image; generating a second metal-corrected image by combining the second metal image and the second metal-reduced material image; and outputting at least one of the first metal-corrected image, the second metal-corrected image, and a mono-energetic image comprising a combination of the first metal-corrected image and the second metal-corrected image. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. An imaging system, comprising:
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an x-ray source that emits a beam of x-rays toward an object to be imaged, the x-ray source configured to emit x-rays with a high energy and a low energy; a detector that receives the x-rays attenuated by the object; a data acquisition system (DAS) operably connected to the detector; and a computer operably connected to the DAS and programmed with instructions in non-transitory memory that when executed cause the computer to; acquire, via the DAS, a first projection dataset and a second projection dataset; detect a location of metal in the first projection dataset; generate a first metal-corrected projection dataset based on the first projection dataset and the location of the metal; and generate a second metal-corrected projection dataset based on the second projection dataset and the location of the metal. - View Dependent Claims (20)
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Specification