X-ray radiography method and system
US5526442A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1994 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Oct 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/80
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An X-ray radiography method and apparatus in which a phantom such as a chart having elements arranged in predetermined positions is irradiated with X-rays and an X-rays detection unit detects signals thereof. An image of the chart is obtained and a center position of each of the elements in the image of the chart is obtained as well as for those elements which are not within the imaging field of view. Pixel positions for a distortion free image is obtained and a transform table is prepared making each of the pixel positions in the image of the chart correspond to each of the pixel positions in the distortion free image. A plurality of digital images of a subject to be examined are obtained and the digital images are corrected in accordance with the transform table. The corrected digital images are then joined together and a digital image is displayed, wherein common portions in the corrected images are in accordance with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.