System and method for iterative reconstruction using mask images
First Claim
Patent Images
1. A method for processing image data comprising:
- iteratively processing an image estimate, wherein each iteration of processing comprises updating the image estimate with an update image; and
deriving the update image for each iteration based at least in part on a scale image derived from a mask image that defines a subset of pixels participating in the reconstruction based on an imaged object, wherein the scale image is updated based on a numerator term and a denominator term and wherein the denominator term is based on the mask image.
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Abstract
A method and system are provided for iteratively processing an image estimate. In one embodiment, the image estimate is updated with an update image each iteration of processing. In this embodiment, the update image for each iteration is derived based at least in part on a scale image derived from a mask image. The mask image defines a subset of pixels participating in the reconstruction based on an imaged object. The scale image is updated based on a numerator term and a denominator term. The denominator term is based on the mask image. Computer routines for processing image data for processing image data in accordance with these techniques are also provided.
29 Citations
39 Claims
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1. A method for processing image data comprising:
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iteratively processing an image estimate, wherein each iteration of processing comprises updating the image estimate with an update image; and deriving the update image for each iteration based at least in part on a scale image derived from a mask image that defines a subset of pixels participating in the reconstruction based on an imaged object, wherein the scale image is updated based on a numerator term and a denominator term and wherein the denominator term is based on the mask image. - View Dependent Claims (4, 5, 6, 7, 8)
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2-3. -3. (canceled)
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9-14. -14. (canceled)
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15. One or more computer-readable media, comprising:
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a routine configured to iteratively process an image estimate, wherein each iteration of processing comprises updating the image estimate with an update image; and a routine configured to derive the update image for each iteration based at least in part on a scale image derived from a mask image that defines a subset of pixels participating in the reconstruction based on an imaged object, wherein the scale image is updated based on a numerator term and a denominator term and wherein the denominator term is based on the mask image.
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16-18. -18. (canceled)
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19. A method for iteratively reconstructing an image comprising:
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providing an image estimate; projecting the image estimate using a current view subset to generate a calculated sinogram; calculating an error sinogram based on the calculated sinogram; back-projecting at least a portion of the error sinogram to generate a back-projected error; generating an update image using the back-projected error and a scale image generated using a mask image derived based upon an object that is the subject of the image estimate; and updating the image estimate using the update image. - View Dependent Claims (20, 21, 22, 23, 24, 26, 27, 28)
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25. (canceled)
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29-30. -30. (canceled)
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31. One or more computer-readable media, comprising:
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a routine configured to provide an image estimate; a routine configured to project the image estimate using a current view subset to generate a calculated sinogram; a routine configured to calculate an error sinogram based on the calculated sinogram; a routine configured to back-project at least a portion of the error sinogram to generate a back-projected error; a routine configured to generate an update image using the back-projected error and a scale image generated using a mask image derived based upon an object that is the subject of the image estimate; and a routine configured to update the image estimate using the update image. - View Dependent Claims (35, 37)
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32-34. -34. (canceled)
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36. (canceled)
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38. An image processing system, comprising:
a processing component configured to iteratively process an image estimate, wherein each iteration of processing comprises updating the image estimate with an update image and to derive the update image for each iteration based at least in part on a scale image derived from a mask image that defines a subset of pixels participating in the reconstruction based on an imaged object, wherein the scale image is updated based on a numerator term and a denominator term and wherein the denominator term is based on the mask image.
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39. An image processing system, comprising:
a processing component configured to provide an image estimate, to project the image estimate using a current view subset to generate a calculated sinogram, to calculate an error sinogram based on the calculated sinogram, to back-project at least a portion of the error sinogram to generate a back-projected error, to generate an update image using the back-projected error and a scale image generated using a mask image derived based upon an object that is the subject of the image estimate, and to update the image estimate using the update image.
Specification