System and method of iterative image reconstruction for computed tomography
First Claim
1. A non-transitory computer readable storage medium having stored thereon a computer program comprising instructions, which, when executed by a computer, cause the computer to:
- acquire a set of projection data corresponding to a set of image data over a time period of data acquisition, the set of image data corresponding to a plurality of voxels, wherein each of the plurality of voxels corresponds to a distinct acquisition time within the time period of data acquisition;
develop a mathematical model representing the plurality of voxels as a function of time based on a plurality of kinetic parameters associated therewith, the plurality of kinetic parameters corresponding to a kinetic motion of the plurality of voxels;
calculate the plurality of kinetic parameters of the plurality of voxels from the mathematical model; and
reconstruct an image from the set of projection data based on the calculated kinetic parameters of the plurality of voxels.
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Abstract
A system and method include acquisition of a set of image data corresponding to a time period of data acquisition, the set of image data corresponding to a plurality of voxels, wherein each of the plurality of voxels corresponds to a distinct acquisition time within the time period of data acquisition. The system and method further include the modeling of the plurality of voxels as a function of time based on a plurality of kinetic parameters associated therewith and reconstruction of an image from the set of image data based on the modeled plurality of voxels.
39 Citations
33 Claims
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1. A non-transitory computer readable storage medium having stored thereon a computer program comprising instructions, which, when executed by a computer, cause the computer to:
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acquire a set of projection data corresponding to a set of image data over a time period of data acquisition, the set of image data corresponding to a plurality of voxels, wherein each of the plurality of voxels corresponds to a distinct acquisition time within the time period of data acquisition; develop a mathematical model representing the plurality of voxels as a function of time based on a plurality of kinetic parameters associated therewith, the plurality of kinetic parameters corresponding to a kinetic motion of the plurality of voxels; calculate the plurality of kinetic parameters of the plurality of voxels from the mathematical model; and reconstruct an image from the set of projection data based on the calculated kinetic parameters of the plurality of voxels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 32, 33)
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20. A method comprising:
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acquiring a set of projection data corresponding to a plurality of image voxels of a set of CT image data, wherein each of the plurality of image voxels corresponds to a distinct time of data acquisition; selecting a kinetic parameter model to estimate a plurality of sets of kinetic parameters for the plurality of image voxels, each set of kinetic parameters representing a motion of an object at the distinct time of data acquisition of the associated image voxel; calculating motion of the plurality of image voxels using the kinetic parameter model; and reconstructing an image of the object based on the calculated motion; and wherein the kinetic parameter model estimates the plurality of sets of kinetic parameters for the plurality of image voxels independently from the set of projection data. - View Dependent Claims (21, 22, 23, 24, 25)
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26. An imaging system comprising:
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a rotatable gantry having an opening for receiving an object to be scanned; an x-ray source coupled to the rotatable gantry and configured to project x-rays through the opening; a generator configured to energize the x-ray source to an energy level to generate x-rays corresponding to the energy level; a detector having pixels therein, the detector attached to the rotatable gantry and positioned to receive x-rays projected from the x-ray source; and a computer programmed to; access a CT projection dataset corresponding to a plurality of image voxels acquired over a period of data acquisition; model a plurality of kinetic parameters corresponding to the plurality of image voxels, the model representing motion of the plurality of image voxels; calculate a motion of the object from the model; and iteratively reconstruct an image from the CT projection dataset based on the calculated motion. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification