X-ray diagnostics installation for substraction angiography
US4709385A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1986 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Jan 30, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/3205
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An x-ray diagnostics installation for subtraction angiography has an image memory connected to an output of an x-ray image intensifier video chain which has a number of addresses for storing individual x-ray video signals obtained during a dynamic body cycle of a patient under observation. A differencing unit receives stored signals from the image memory as well as current video signals and substracts those signals to form a superimposed image. Entry and readout of signals to and from the image memory is under the command of a control unit which is connected to the patient through, for example, an EKG circuit for identifying selected occurrences in the body cycle under observation. Entry and readout of data from the image memory is thereby controlled in synchronization with the selected occurrences in the cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.