Target-specific dose and scatter estimation in CT images
US10497113B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 18, 2014 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Dec 18, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments disclose a method performed by at least one processor for processing a plurality of x-ray projection images of a subject, the method comprising a plurality of operations including reconstructing the projection images to yield a volume reconstruction; segmenting the reconstructed volume by assigning a material type to each voxel; estimating a first set of scatter images corresponding to a subset of the projection images by calculating probabilistic predictions of interactions of x-rays with the subject and applying a low pass spatial filter to the scatter images; estimating a second set of scatter images corresponding to projection images not included in the subset, based on the first set of scatter images; and subtracting, for each projection image, the corresponding scatter image to yield a corrected projection image. Applying the plurality of operations of the method in an iterative process on graphics-processor-quality computational hardware enables real-time scatter correction and reconstruction of CT volume images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.