Method of and system for reducing metal artifacts in images generated by x-ray scanning devices
US6721387B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Jun 13, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/4488
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of reducing metal artifacts in a computed tomography (CT) system includes:A. generating a preliminary image from input projection data collected by the CT system;B. identifying metal objects in the preliminary image;C. generating secondary projections from the input projection data by removing projections of objects having characteristics that may cause the objects to be altered in a final artifact-corrected image.D. extracting the projections of metal objects identified in step B from the secondary projection data generated in step C.E. generating corrected projections by removing the projections of the metal objects extracted in Step D from the input projection data.F. generating a final image by reconstructing the corrected projections generated in step E and inserting the metal objects identified in Step B into the final image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.