Titled gantry helical cone-beam Feldkamp reconstruction for multislice CT
First Claim
1. An X-ray computed tomography apparatus, comprising:
- a helical scanning device configured to collect projection data while at least one of a gantry and a couch moves along a body axial direction of an object on the couch when at least one of the gantry and the couch is tilted, thereby forming a tilted rotation axis, the helical scanning device including, an X-ray source configured to generate X-rays and to rotate around the object, and a detector having detector elements arranged in a plurality of rows along the body axial direction opposite the X-ray source; and
a reconstructing device configured to reconstruct an image based on the projection data using cone-beam Feldkamp reconstruction.
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Accused Products
Abstract
An X-ray computed tomography apparatus includes a helical scanning device configured to collect projection data while at least one of a gantry and a couch moves along a body axial direction of an object on the couch when at least one of the gantry and the couch is tilted, the helical scanning device including an X-ray source configured to generate X-rays, and a detector disposed opposite the X-ray source and having detector elements arranged in a plurality of rows along the body axial direction, and a reconstructing device configured to reconstruct an image based on the projection data using cone-beam Feldkamp reconstruction.
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Citations
18 Claims
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1. An X-ray computed tomography apparatus, comprising:
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a helical scanning device configured to collect projection data while at least one of a gantry and a couch moves along a body axial direction of an object on the couch when at least one of the gantry and the couch is tilted, thereby forming a tilted rotation axis, the helical scanning device including, an X-ray source configured to generate X-rays and to rotate around the object, and a detector having detector elements arranged in a plurality of rows along the body axial direction opposite the X-ray source; and
a reconstructing device configured to reconstruct an image based on the projection data using cone-beam Feldkamp reconstruction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for X-ray computed tomography, comprising:
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helically scanning an object with X-rays to collect projection data while at least one of a gantry and a couch moves along a body axial direction of an object on the couch when at least one of the gantry and the couch is tilted, thereby forming a tilted rotation axis, the helically scanning including, generating X-rays from an X-ray source, and detecting projection data using a detector disposed opposite the X-ray source and having detector elements arranged in a plurality of rows along the body axial direction; and
reconstructing an image based on the projection data using cone-beam Feldkamp reconstruction. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 18)
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17. An X-ray computed tomography apparatus, comprising:
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a helical scanning device configured to collect projection data while at least one of a gantry and a couch moves along a body axial direction of an object on the couch when at least one of the gantry and the couch is tilted, the helical scanning device including, an X-ray source configured to generate X-rays, and a detector disposed opposite the X-ray source and having detector elements arranged in a plurality of rows along the body axial direction; and
means for reconstructing an image based on the projection data using cone-beam Feldkamp reconstruction.
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Specification