System and method for cone-beam computed tomography imaging and apparatus for the same
AssigneeElectronics and Telecommunications Research Institute
InventorsSoo Yeul Lee, Seung Hoon Chae
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a cone beam computed tomography (CT) imaging system, an image processing method, and a device therefor. An image processing method performed by a cone beam computed tomography (CT) imaging apparatus including a source and a detector that rotate around an object may include: obtaining a plurality of projection images projected on the detector for the object; obtaining a correction projection matrix; and reconstructing a three-dimensional image by back-projecting the plurality of projection images based on the correction projection matrix.
Claims13
An image processing method performed by a cone beam computed tomography (CT) imaging apparatus including a source and a detector that rotate around an object, the method comprising:
- obtaining a plurality of projection images projected on the detector for the object;
- obtaining a correction projection matrix;
- and
- reconstructing a three-dimensional image by back-projecting the plurality of projection images based on the correction projection matrix,
- wherein the obtaining the correction projection matrix comprising:
- obtaining spatial coordinates for a plurality of beads in a geometric calibration phantom with the plurality of beads and each of the center coordinates for the plurality of beads from a projection image projected on the detector for the geometric calibration phantom;
- and
- obtaining the correction projection matrix based on a component-weighted projection matrix obtained by assigning a weight to a specific component to each of the center coordinates of the plurality of beads.
A cone beam computed tomography (CT) imaging apparatus including a source and a detector that rotate around an object, the apparatus comprising:
- at least one processor;
- and
- at least one memory operably connected to the at least one processor and storing instructions that, when executed by the one or more processors, cause the apparatus to perform operations for image processing comprising:
- obtaining a plurality of projection images projected on the detector for the object;
- obtaining a correction projection matrix;
- and
- reconstructing a three-dimensional image by back-projecting the plurality of projection images based on the correction projection matrix,
- wherein the obtaining the correction projection matrix comprising:
- obtaining spatial coordinates for a plurality of beads in a geometric calibration phantom with the plurality of beads and each of the center coordinates for the plurality of beads from a projection image projected on the detector for the geometric calibration phantom;
- and
- obtaining the correction projection matrix based on a component-weighted projection matrix obtained by assigning a weight to a specific component to each of the center coordinates of the plurality of beads.
At least one non-transitory computer-readable medium storing at least one instruction, wherein the at least one instruction executable by at least one processor controls a cone beam computed tomography (CT) imaging apparatus including a source and a detector that rotate around an object to:
- obtain a plurality of projection images projected on the detector for the object;
- obtain a correction projection matrix;
- and
- reconstruct a three-dimensional image by back-projecting the plurality of projection images based on the correction projection matrix,
- wherein the obtaining the correction projection matrix comprising:
- obtaining spatial coordinates for a plurality of beads in a geometric calibration phantom with the plurality of beads and each of the center coordinates for the plurality of beads from a projection image projected on the detector for the geometric calibration phantom;
- and
- obtaining the correction projection matrix based on a component-weighted projection matrix obtained by assigning a weight to a specific component to each of the center coordinates of the plurality of beads.
Dependencies are inferred from the claim text.