SYSTEMS AND METHODS FOR METAL ARTIFACT REDUCTION
First Claim
1. A method, comprising:
- receiving, with at least one processor, a first projection dataset corresponding to X-rays at a first energy level projected towards a subject at a first set of view angles;
receiving, with the at least one processor, a second projection dataset corresponding to X-rays at a second energy level projected towards the subject at a second set of view angles;
identifying, with the at least one processor, a metal trace from at least one of the first projection dataset and the second projection dataset;
converting, with the at least one processor, at least a portion of the first projection dataset to a pseudo dataset at the second energy level; and
generating, with the at least one processor, a final image of the subject based on the second projection dataset, the pseudo dataset, and the metal trace.
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Abstract
A method includes receiving, with at least one processor, a first projection dataset corresponding to X-rays at a first energy level projected towards a subject at a first set of view angles and receiving, with the at least one processor, a second projection dataset corresponding to X-rays at a second energy level projected towards the subject at a second set of view angles. The method further includes identifying, with the at least one processor, a metal trace from at least one of the first projection dataset and the second projection dataset. Moreover, the method includes converting, with the at least one processor, at least a portion of the first projection dataset to a pseudo dataset at the second energy level. The method also includes generating, with the at least one processor, a final image of the subject based on the second projection dataset, the pseudo dataset, and the metal trace.
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Citations
25 Claims
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1. A method, comprising:
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receiving, with at least one processor, a first projection dataset corresponding to X-rays at a first energy level projected towards a subject at a first set of view angles; receiving, with the at least one processor, a second projection dataset corresponding to X-rays at a second energy level projected towards the subject at a second set of view angles; identifying, with the at least one processor, a metal trace from at least one of the first projection dataset and the second projection dataset; converting, with the at least one processor, at least a portion of the first projection dataset to a pseudo dataset at the second energy level; and generating, with the at least one processor, a final image of the subject based on the second projection dataset, the pseudo dataset, and the metal trace. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system, comprising:
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at least one processor; a communication subunit configured to; receive a first projection dataset corresponding to X-rays at a first energy level projected towards a subject at a first set of view angles; and receive a second projection dataset corresponding to X-rays at a second energy level projected towards the subject at a second set of view angles; a mask subunit communicatively coupled with the communication subunit and configured to identify a metal trace from at least one of the first projection dataset and the second projection dataset; a conversion subunit communicatively coupled with the mask subunit and configured to convert at least a portion of the first projection dataset to a pseudo dataset at the second energy level; and a final image subunit communicatively coupled with the conversion subunit and configured to generate a final image of the subject based on the second projection dataset, the pseudo dataset, and the metal trace, wherein one or more of the communication subunit, the mask subunit, the conversion subunit, and the final image subunit are executable by the at least one processor. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An imaging system, comprising:
a computed tomography (CT) scanner configured to; project X-rays at a first energy level towards a subject at a first set of view angles; project X-rays at a second energy level towards the subject at a second set of view angles; generate a first projection dataset corresponding to the X-rays at the first energy level; generate a second projection dataset corresponding to the X-rays at the second energy level; a controller communicatively coupled to the CT scanner and comprising; at least one processor; a communication subunit configured to receive the first projection dataset and the second projection dataset from the CT scanner; a mask subunit communicatively coupled with the communication subunit and configured to identify a metal trace from at least one of the first projection dataset and the second projection dataset; a conversion subunit communicatively coupled with the mask subunit and configured to convert at least a portion of the first projection dataset to a pseudo dataset at the second energy level; and a final image subunit communicatively coupled with the conversion subunit and configured to generate a final image of the subject based on the second projection dataset, the pseudo dataset, and the metal trace, wherein one or more of the communication subunit, the mask subunit, the conversion subunit, and the final image subunit are executable by the at least one processor.
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25. A computer program product comprising a non-transitory computer readable medium encoding instructions that, in response to execution by at least one processor, cause the at least one processor to perform operations comprising:
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receiving a first projection dataset corresponding to X-rays at a first energy level projected towards a subject at a first set of view angles; receiving a second projection dataset corresponding to X-rays at a second energy level projected towards the subject at a second set of view angles; identifying a metal trace from at least one of the first projection dataset and the second projection dataset; converting at least a portion of the first projection dataset to a pseudo dataset at the second energy level; and generating a final image of the subject based on the second projection dataset, the pseudo dataset, and the metal trace.
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Specification