Projection truncation processing for CBCT
US8620052B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2010 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | May 27, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2211/432
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for 3-D volume image reconstruction of a subject. 2-D projection images are obtained over a range of scan angles, and one or more truncated images are identified from the obtained images. From each of the one or more truncated images, a corrected truncated image is formed by a repeated process of identifying a row of image data values in the one or more truncated images, assigning an extension length to one or both ends of the row according to the row location in the truncated image, and extending the truncated image data for the row of image data values by applying a row-dependent cosine function to each value in the extension length. A 3-D volume image is reconstructed using one or more of the corrected truncated images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.