Radiography
US4137454A · kind A · utility
9Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1977 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Mar 2, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/64
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In pulsed X-ray fluoroscopy in which the fluoroscopic screen receiving the X-rays is subsequently observed by a video recording system incorporating an image intensifier, the quality of the video image is impaired because of electrical noise and phosphor flare. The image quality is improved by reducing the gain of the video system synchronously with the occurrence of each X-ray pulse. In addition, the residual disturbance left on the video output is stabilized by synchronizing the video framing cycle frequency with the X-ray pulse frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.