Apparatus and method for joint-edge-preserving regularization to reduce noise in four-dimensional computed tomography images
US10360677B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2016 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Oct 7, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided to denoise computed tomography (CT) sinograms and reconstructed images by minimizing a penalized-weighted-least-squares objective function that includes a joint-edge-preserving regularization term. Common information shared among a series of related image and/or sinograms can beneficially be used to more accurately identify edges common to all of the image and/or sinograms. Thus, a joint edge preserving regularizer that relies on information from a series of three-dimensional constituents of a four-dimensional image, such as a time series of images in a CT profusion study or an energy series of images in spectral CT, can improve image quality by better preserving edges while simultaneously denoising the constituent images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.