Image reconstruction in computed tomography
US9036885B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2013 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Nov 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2211/424
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of projection domain processing based on a local transform and shrinkage for use in reconstructing digital images from a set of projections, the method including providing a target image of a target object, providing projection data of the target object, producing filtered projection data by applying a sparsifying transform and a shrinkage function to the projection data, followed by an inverse of the sparsifying transform, producing a restored image by applying a reconstruction transform to the filtered projection data, comparing the restored image to the target image, and producing an optimized projection domain shrinkage function by adapting the shrinkage function to minimize differences between the restored image and the target image. Related apparatus and methods are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.