Method for artifact reduction in a medical image data set, X-ray device, computer program and electronically readable data carrier
US11369331B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2019 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Apr 2, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2211/448
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for the reduction of streak artifacts in an image data set reconstructed from projection images of an X-ray device is provided. The method includes determining a first interim data set by applying a non-linear low-pass filter to pixels that satisfy a selection condition. A second non-linear, high-pass-filtered interim data set is determined by pixel-by-pixel subtraction of the first interim data set from the image data set. The second interim data set is Fourier transformed in order to obtain a spatial frequency data set. Frequency portions attributable to artifacts in the spatial frequency data set are removed, and the processed spatial frequency data set is inverse Fourier transformed, such that a third interim data set is obtained. An artifact-reduced result data set is determined by addition of the third interim data set and the first interim data set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.