SYSTEM AND METHOD FOR IMAGE CALIBRATION
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Abstract
The disclosure relates to a system and method for generating an image by the following steps: obtaining a first image and a second image relating to a subject; obtaining a third image of the subject by a radiology imaging technique; registering the first image and the second image to obtain a first element; calibrating the third image to obtain a second element based on the first element; calibrating the second image based on the second element.
43 Citations
40 Claims
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1-20. -20. (canceled)
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21. A method for image calibration, the method comprising:
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obtaining a first image based on first data relating to a subject; obtaining a second image based on second data relating to the subject; obtaining a third image of the subject; registering the first image and the second image to obtain a motion field; calibrating the third image based on the motion field to obtain a calibrated image; and correcting the second image based on the calibrated image to generate a corrected second image, wherein obtaining a first image based on first data relating to a subject further comprising; generating an attenuation sinogram by performing forward projection on the third image; generating a contour filter based on the attenuation sinogram; filtering the first data based on the contour filter to obtain filtered first data; and reconstructing the first image based on the filtered first data. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for image calibration, the method comprising:
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obtaining a first image based on first data relating to a subject; obtaining an initial second image based on second data relating to the subject; obtaining a third image of the subject; during each of a plurality of iterations, obtaining the initial second image or an updated second image from a prior iteration; registering the second image and the first image to obtain a motion field; calibrating the third image based on the motion field to obtain an attenuation correction coefficient; obtaining a scatter correction coefficient based on the attenuation correction coefficient; and generating the updated second image to be used in a next iteration by correcting the second image based on the scatter correction coefficient; and reconstructing a corrected second image based on the scatter correction coefficient and the attenuation correction coefficient obtained in the last iteration of the plurality of iterations, wherein obtaining a first image based on first data relating to a subject further comprising; generating an attenuation sinogram by performing forward projection on the third image; generating a contour filter based on the attenuation sinogram; filtering the first data based on the contour filter to obtain filtered first data; and reconstructing the first image based on the filtered first data.
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34. A system for image calibration, the system comprising:
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a non-transitory computer-readable storage medium storing executable instructions, and at least one processor in communication with the computer-readable storage medium, when executing the executable instructions, causing the system to implement a method comprising; obtaining a first image based on first data relating to a subject, a second image based on second data relating to the subject, and a third image of the subject; registering the first image and the second image to obtain a motion field; calibrating the third image based on the motion field to obtain a calibrated image; and correcting the second image based on the calibrated image to generate a corrected second image, wherein obtaining a first image based on first data relating to a subject further comprising; generating an attenuation sinogram by performing forward projection on the third image; generating a contour filter based on the attenuation sinogram; filtering the first data based on the contour filter to obtain filtered first data; and reconstructing the first image based on the filtered first data. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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Specification