Method for correcting scattered radiation in a computed tomography apparatus, and computed tomography apparatus
US11253215B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2020 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Jul 10, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2211/452
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is directed to a method for correcting scattered radiation in a computed tomography apparatus, wherein x-ray radiation emanating from an x-ray radiation source is divided into a plurality of partial beams by a grid structure such that irradiated regions and non-irradiated regions alternate, wherein a grid position of the grid structure is changed parallel to a detector surface. In a changed grid position, previously non-irradiated regions are irradiated and previously irradiated regions are not irradiated, wherein at least one radiograph of the test object is captured for each of the grid positions, wherein the radiographs captured at different grid positions are used to generate a bright field radiograph from the respectively irradiated regions and a dark field radiograph from the respectively non-irradiated regions and wherein a corrected radiograph is generated on the basis of the bright field radiograph and the dark field radiograph.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.