Method and system for reconstructing an image from projection data acquired by a cone beam computed tomography system
First Claim
1. A method for reconstructing a three-dimensional image of a region of interest of an object disposed within an object region from cone beam projection data, the method comprising the steps of:
- a) acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) identifying a region of interest within at least two projection images;
c) projecting each identified region of interest through at least a portion of the object region to identify a three-dimensional reconstruction region defined by a plurality of points; and
d) reconstructing the image at each of the plurality of points to form the three-dimensional image of the region of interest.
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Accused Products
Abstract
A method and system for reconstructing a three-dimensional image of an object from cone beam projection data. The method comprising the steps of: acquiring the projection data, wherein the projection data comprises a set of cone beam projection images; selecting at least one cone beam projection image; identifying a region of interest within each selected cone beam projection image; defining a three-dimensional lattice of points, wherein the projection into each selected cone beam projection image of the points in the three-dimensional lattice provides a sampling of the identified region of interest in the corresponding selected cone beam projection image; and, reconstructing an image of the object at each point in the three-dimensional lattice to form a three-dimensional image of the object.
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Citations
31 Claims
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1. A method for reconstructing a three-dimensional image of a region of interest of an object disposed within an object region from cone beam projection data, the method comprising the steps of:
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a) acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) identifying a region of interest within at least two projection images;
c) projecting each identified region of interest through at least a portion of the object region to identify a three-dimensional reconstruction region defined by a plurality of points; and
d) reconstructing the image at each of the plurality of points to form the three-dimensional image of the region of interest. - View Dependent Claims (2, 3, 4, 5, 6, 27)
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7. A method for reconstructing a three-dimensional image of a region of interest of an object from cone beam projection data, the method comprising the steps of:
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a) acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) identifying a region of interest within a plurality of projection images;
c) projecting each identified region of interest to a source position corresponding with the associated projection image to define a three-dimensional projected cone;
d) sampling the intersection of the projected cones to determine a three-dimensional reconstruction region defined by a plurality of points; and
e) reconstructing the region of interest at each of the plurality of points to form the three-dimensional image of the region of interest. - View Dependent Claims (8, 9, 10, 11)
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12. A method for reconstructing a three-dimensional image of a region of interest of an object disposed within an object region from cone beam projection data, the method comprising the steps of:
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a) acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) identifying a region of interest within one of the plurality of projection images;
c) projecting the identified region of interest through at least a portion of the object region to define a three-dimensional reconstruction region defined by a plurality of points; and
d) reconstructing the region of interest at each of the plurality of points to form the three-dimensional image of the region of interest. - View Dependent Claims (13, 14, 15)
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16. A method for reconstructing a three-dimensional image of a region of interest of an object from cone beam projection data, the method comprising the steps of:
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a) acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) identifying a region of interest within a first one of the plurality of projection images;
c) projecting the identified region of interest to a source position corresponding with the first one of the plurality of projection images to define a first three-dimensional projection cone;
d) projecting a second one of the plurality of projection images to a source position corresponding with the second one of the plurality of projection images to define a second three-dimensional projection cone;
e) using the first and second projected cones to determine a three-dimensional reconstruction region defined by a plurality of points; and
f) reconstructing the region of interest at each of the plurality of points to form the three-dimensional image of the region of interest. - View Dependent Claims (17, 18, 19)
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20. A system for reconstructing a three-dimensional image of a region of interest of an object disposed within an object region from cone beam projection data, comprising:
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a) means for acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) means for identifying a region of interest within each of two projection images;
c) means for projecting each identified region of interest through at least a portion of the object region to identify a three-dimensional reconstruction region defined by a three-dimensional lattice of points; and
d) means for reconstructing the image at each point in the three-dimensional lattice of points. - View Dependent Claims (21, 22, 23)
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24. A system for reconstructing a three-dimensional image of a region of interest of an object from cone beam projection data, comprising:
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a) means for acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) means for identifying a region of interest within a plurality of projection images, respectively;
c) means for projecting each identified region of interest to a source position corresponding with the associated projection image to define a three-dimensional projected cone;
d) means for sampling the intersection of the projected cones to determine a three-dimensional reconstruction region defined by a plurality of points; and
e) means for reconstructing the region of interest at each of the plurality of points to form the three-dimensional image of the region of interest.
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25. A system for reconstructing a three-dimensional image of a region of interest of an object disposed within an object region from cone beam projection data, comprising:
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a) means for acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) means for identifying a region of interest within one of the plurality of projection images;
c) means for projecting the identified region of interest through the object region to define a three-dimensional reconstruction region defined by a plurality of points; and
d) means for reconstructing the region of interest at each of the plurality of points to form the three-dimensional image of the region of interest.
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26. A system for reconstructing a three-dimensional image of a region of interest of an object from cone beam projection data, comprising:
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a) means for acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) means for identifying a region of interest within a first one of the plurality of projection images;
c) means for projecting the identified region of interest to a source position corresponding with the first one of the plurality of projection images to define a first three-dimensional projection cone;
d) means for projecting a second one of the plurality of projection images to a source position corresponding with the second one of the plurality of projection images to define a second three-dimensional projection cone;
e) means for using the first and second projected cones to determine a three-dimensional reconstruction region defined by a plurality of points; and
f) means for reconstructing the region of interest at each of the plurality of points to form the three-dimensional image of the region of interest.
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28. A method for reconstructing a three-dimensional image of a region of interest of an object disposed within an object region from cone beam projection data, the method comprising the steps of:
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a) acquiring the cone beam projection data, the cone beam projection data comprising a plurality of cone beam projection images;
b) identifying a region of interest within a first one of the plurality of projection images;
c) projecting the region of interest identified within the first one of the plurality of projection images to a source position corresponding with the first one of the plurality of projection images to define a first three-dimensional projection cone;
d) defining a second three-dimensional volume;
e) using the first three-dimensional projection cone and the second three-dimensional volume to identify a three-dimensional reconstruction region defined by a plurality of points; and
f) reconstructing the region of interest at each of the plurality of points to form the three-dimensional image of the region of interest. - View Dependent Claims (29, 30, 31)
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Specification