Three dimensional back projection method and an X-ray CT apparatus
US6845144B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2003 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Feb 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S378/901
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
To perform cone beam reconstruction by using projection data correctly corresponding to X-ray beam having passed through each pixel in the reconstruction area, data D1 is obtained which is plane projected to a plane based on projection data D0. Then, plane projection data D1 to the projection plane pp is projected to the reconstruction area in the direction of X-ray transmission to obtain back projection pixel data D2. Thereafter, back projection pixel data D2 will be added for each corresponding pixel for all views to obtain back projection data D3. The present invention provides reconstruction by device of projection data correctly corresponding to the X-ray beam having passed through the reconstruction area. Through the plane projection to a plane the operation will become simplified and faster.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.