X-Ray diagnostic installation for radiography and fluoroscopy
US4400823A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Jun 12, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J35/147
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An exemplary embodiment includes a television installation for the transmission of the X-ray image, a dose rate device for supplying a dose rate value during fluoroscopy, and a control circuit for controlling the size of the focus of the X-ray tube, to which at least one dose rate value of the dose rate device is supplied. An X-ray tube is present with at least one control electrode for the determination of the focus size via the electrode potential. The control electrode is connected with the control circuit via a control voltage generator. In the control circuit, data is stored which establishes the focus size at the smallest possible value, in dependence upon the dose rate value, the permissible load of the X-ray tube, and upon radiography values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.