Two-step radon inversion processing for .phi.-planes having local radon origins
First Claim
1. A method of operating a 3D CT imaging apparatus having a cone beam radiation source and detector arrangement, for reconstructing an image of an object that is scanned by said source and detector arrangement, comprising the following steps:
- operating said source and detector arrangement at a plurality of source positions along a scan path that traverses the object so as to acquire a corresponding plurality of sets of measurement data representative of radiation attenuation caused by said object;
processing the acquired measurement data so as to develop Radon data on a set of vertically oriented co-axial φ
-planes that partition a Radon space; and
reconstructing an image of the object by performing two 2D radon inversions of the Radon data, wherein each of the Radon space φ
-planes is sampled during a first of said inversion processing'"'"'s so as to have its own independent local Radon origin.
3 Assignments
0 Petitions
Accused Products
Abstract
A two-step 3D Radon inversion processor for processing Radon data on a set of vertically oriented co-axial φ-planes that partition Radon space, wherein each of the φ-planes is sampled during the processing so as to have its own independent local Radon origin. In accordance with further principles of the present invention, a 3D Radon data generator generates Radon data on a set of vertically oriented co-axial φ-planes that partition Radon space, wherein each of the φ-planes is sampled so as to have its own independent local Radon origin, and a two-step 3D Radon inversion processor independently processes each of the φ-planes. Any shift of the local Radon origins with respect to a global coordinate system is compensated for during the 3D Radon inversion processing. Compensation for the origin shift may be made during or after a first step of the Radon inversion processing.
7 Citations
7 Claims
-
1. A method of operating a 3D CT imaging apparatus having a cone beam radiation source and detector arrangement, for reconstructing an image of an object that is scanned by said source and detector arrangement, comprising the following steps:
-
operating said source and detector arrangement at a plurality of source positions along a scan path that traverses the object so as to acquire a corresponding plurality of sets of measurement data representative of radiation attenuation caused by said object; processing the acquired measurement data so as to develop Radon data on a set of vertically oriented co-axial φ
-planes that partition a Radon space; andreconstructing an image of the object by performing two 2D radon inversions of the Radon data, wherein each of the Radon space φ
-planes is sampled during a first of said inversion processing'"'"'s so as to have its own independent local Radon origin. - View Dependent Claims (2)
-
-
3. A method of operating a 3D CT imaging apparatus having a cone beam radiation source and detector arrangement, for reconstructing an image of an object that is scanned by said source and detector arrangement, comprising the following steps:
-
operating said source and detector arrangement at a plurality of source positions along a scan path that traverses the object so as to acquire a corresponding plurality of sets of measurement data representative of radiation attenuation caused by said object; processing the acquired measurement data so as to develop Radon data on a set of vertically oriented co-axial φ
-planes that partition a Radon space, wherein each of the φ
-planes is sampled so as to have its own independent local Radon origin; andreconstructing an image of the object by performing two-step 3D Radon inversion processing of the Radon data wherein each of the φ
-planes is independently processed. - View Dependent Claims (4, 5, 6, 7)
-
Specification