Diagnostic X-ray apparatus having a master timing control unit
US4575752A · kind A · utility
Inventor
Key dates
| Filing date | Jun 10, 1983 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Jun 10, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/64
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diagnostic X-ray apparatus emitting X-ray radiation with a digital X-ray subtraction imaging technique which comprises digitization of video signals from an image intensifier-T.V. chain, digital subtraction and reconversion of the resulting digital difference video signals to analog signals under control of a master timing control unit. The master timing control unit comprises a clock for generating basic clock pulses supplied to a synchronizing delay circuit for generating a plurality of delayed clock pulses which are selected by a predetermined formula, and the resulting pulses are used to maintain the entire system in a proper phase relationship.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.