X-ray ct apparatus and an image reconstructing method for obtaining a normal reconstructed image by adding weights to a plurality of partial reconstructed images
US6061422A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Apr 30, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S378/901
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image reconstructing method in relation to an X-ray CT apparatus for shifting, sequentially by a predetermined angle, a reconstructed image for a projection angle in a predetermined range so as to obtain a continuous reconstructed image, in which one normal reconstructed image is obtained as follows: First, 180.degree. amount of parallel beam projection data, which is obtained by converting fan beam measurement data into parallel beam data, is divided at a predetermined angle so as to obtain each partial reconstructed image for each partial segment. Then, weight-imposing is performed on the plurality of partial reconstructed images obtained, and the weight-imposed images are superposed, thus obtaining the one sheet of normal reconstructed image. At that time, concerning partial reconstructed images the view angles of which are in an opposing relationship to each other, a weighted average thereof is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.