Method for correcting for beam hardening in a CT image
US6600801B2 · kind B2 · utility
16Cited by
6References
5Claims
0Family size
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Inventor
Key dates
| Filing date | Oct 17, 2001 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Nov 19, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S378/901
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for correcting for beam hardening in an initial CT image, which is composed of pixels arranged in a matrix, correction data are determined from the initial image by re-projection of the pixels from the initial image at a large number of projection angles, the pixels from the initial image being compared with a threshold value for each of the projection angles during the re-projection, and the re-projection being carried out for only those pixels from the initial image which have a pixel value above the threshold value. The correction data are used to determine a corrected image from the initial image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.