Diagnostic X-ray apparatus
US4628355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1983 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Aug 29, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/38
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A diagnostic X-ray apparatus emitting pulsed X-ray radiation includes a processor for performing digital X-ray subtraction of a previous mask image from current images. The apparatus includes circuitry for digitization of the video signals from an image intensifier-TV chain, digital subtraction to obtain digital difference signals, and subsequent reconversion of the resultant digital difference video signals to analog signals. Pulsed X-ray exposures are performed during the blanking periods of the TV camera following which the television fields immediately following the pulsed X-ray exposure are scanned and read out, and are supplied to the processor for performing the digital X-ray subtraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.