X-ray imaging system
US4952794A · kind A · utility
5Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Aug 1, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
As a result of the use of a slow phosphor in the exit screen of an X-ray image intensifier tube, a number of image fields can be picked up by means of the comparatively fast television camera during the afterglow of the phosphor. This enables quantum noise integration and, when use is made of a CCD camera upon display, a resolution can be achieved upon display which corresponds to the resolution of a conventional pick-up tube. Moreover, in accordance with the invention it is no longer necessary to use a controllable diaphragm and a complex interface for the asynchronous pick-up and reading of the image information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.